diff --git a/benchmarks/3d/PHX.geo b/benchmarks/3d/PHX.geo
new file mode 100644
index 0000000000000000000000000000000000000000..f0907cfa4ed3b47c5274165b6cf1bf2b45d2e6d1
--- /dev/null
+++ b/benchmarks/3d/PHX.geo
@@ -0,0 +1,682 @@
+//////////////////////////////////
+//				//
+//	 COEUR TYPE PHX		//
+//				//
+//////////////////////////////////
+
+
+i_mesh = 1;             // ( 1 : maillage sortie coeur + collecteur chaud - 0 : maillage sortie coeur uniquement) 
+
+
+//////////////////////////////// 
+// Caracteristiques geometriques
+////////////////////////////////
+
+ep_ass   = 120.;    	// entreplat des assemblages
+pas_ass  = 130.;    	// pas des assemblages
+diam_pnl = 120; 	// diametre ou entreplat des P.N.L.
+
+R_ass     = 2.1;     	// ass. fissiles+fertiles : compris entre (nb_couronnes) et (nb_couronnes+1)
+R_ref     = 0.;     	// ass. reflecteurs acier : compris entre (nb_couronnes) et (nb_couronnes+1)
+R_pnl	  = 0.;     	// P.N.L (rondins)	  : compris entre (nb_couronnes) et (nb_couronnes+1)
+
+// valeurs prises dans le cas de COEUR_SEUL
+///////////////////////////////////////////
+//R_ass     = 2.1;     	// ass. fissiles+fertiles : compris entre (nb_couronnes) et (nb_couronnes+1)
+//R_ref     = 3.;     	// ass. reflecteurs acier : compris entre (nb_couronnes) et (nb_couronnes+1)
+//R_pnl	  = 3.5;     	// P.N.L (rondins)	  : compris entre (nb_couronnes) et (nb_couronnes+1)
+
+itype_PNL = 0;		// geometrie des P.N.L : 0 : hexagonale - 1 : Circulaire - 2 : Octogonale
+
+r1   =   700.;     	// rayon de la virole partie inferieure
+r2   =  1200.;     	// rayon de la virole partie superieure
+r3   =   300.;		// rayon du bcc
+r4   =   950.;		// rayon pour l'emplacement des pompes et des echangeurs
+r5   =   200.;		// rayon des pompes et des echangeurs
+
+h1   = 3500.; 		// hauteur du coeur
+h1b  =  500.; 		// distance sortie coeur - "epaulement"
+h2   =  500.; 		// distance "epaulement" - haut du collecteur chaud
+h3   =  100.;		// distance sortie coeur - bcc
+h4   =  100.;		// hauteur entree fluide echangeur
+
+
+/////////////////////////////// 
+// paramètres de discrétisation
+///////////////////////////////
+ 
+lcar  = 0.9*ep_ass;	// longeur caracteristique associee aux assemblages - reflecteurs - P.N.L.
+lcar2 = 2.*lcar;	// longeur caracteristique associee a la partie inferieure de la virole du Collecteur Chaud (en-dessous de l'epaulement)
+//lcar2 = 7.*lcar;	// longeur caracteristique associee a la partie inferieure de la virole du Collecteur Chaud (en-dessous de l'epaulement)
+lcar3 = 10.*lcar;	// longeur caracteristique associee a la partie superieure de la virole du Collecteur Chaud (au-dessus de l'epaulement)
+
+Mesh.Algorithm    = 6;  // 2D mesh algorithm (1=MeshAdapt+Delaunay, 4=MeshAdapt, 5=Delaunay, 6=Frontal)
+Mesh.Algorithm3D  = 4;  // 3D mesh algorithm (1=Tetgen+Delaunay, 4=Netgen)
+Mesh.OptimizeNetgen = 1;
+
+
+//**********************************************************
+//**********************************************************
+
+x0=0.;
+y0=0.;
+rac3= 1.732050807568877294;
+rac2= 1.414213562373095049;
+nassemblage=-1;
+nreflecteur=-1;
+npnl=-1;
+indice=-1;
+indice2=-1;
+indice3=-1;
+indice4=-1;
+
+kle = 0 ;// Cle discretisation
+If(R_ass>0.) kle = kle+1 ; EndIf
+If(R_ref>0.) kle = kle+2 ; EndIf
+If(R_pnl>0.) kle = kle+4 ; EndIf
+
+
+/////////////////////
+Function assemblage
+/////////////////////
+
+p1=newp; Point(p1) = { xc+ep_ass/rac3      , yc          , 0., lcar } ;
+p2=newp; Point(p2) = { xc+ep_ass/(2.*rac3) , yc+ep_ass/2., 0., lcar } ;
+p3=newp; Point(p3) = { xc-ep_ass/(2.*rac3) , yc+ep_ass/2., 0., lcar } ;
+p4=newp; Point(p4) = { xc-ep_ass/rac3      , yc          , 0., lcar } ;
+p5=newp; Point(p5) = { xc-ep_ass/(2.*rac3) , yc-ep_ass/2., 0., lcar } ;
+p6=newp; Point(p6) = { xc+ep_ass/(2.*rac3) , yc-ep_ass/2., 0., lcar } ;
+
+indice++; c[indice]=newreg; Line(c[indice]) = { p1, p2 } ;
+indice++; c[indice]=newreg; Line(c[indice]) = { p2, p3 } ;
+indice++; c[indice]=newreg; Line(c[indice]) = { p3, p4 } ;
+indice++; c[indice]=newreg; Line(c[indice]) = { p4, p5 } ;
+indice++; c[indice]=newreg; Line(c[indice]) = { p5, p6 } ;
+indice++; c[indice]=newreg; Line(c[indice]) = { p6, p1 } ;
+
+nassemblage++; lbord[nassemblage]=newreg; 
+Line Loop(lbord[nassemblage]) = { c[{ indice-5:indice }] } ;
+ass[nassemblage]=newreg; Plane Surface(ass[nassemblage]) = { lbord[nassemblage] } ;
+
+
+Return
+
+/////////////////////
+Function reflecteur
+/////////////////////
+
+p1=newp; Point(p1) = { xc+ep_ass/rac3      , yc          , 0., lcar } ;
+p2=newp; Point(p2) = { xc+ep_ass/(2.*rac3) , yc+ep_ass/2., 0., lcar } ;
+p3=newp; Point(p3) = { xc-ep_ass/(2.*rac3) , yc+ep_ass/2., 0., lcar } ;
+p4=newp; Point(p4) = { xc-ep_ass/rac3      , yc          , 0., lcar } ;
+p5=newp; Point(p5) = { xc-ep_ass/(2.*rac3) , yc-ep_ass/2., 0., lcar } ;
+p6=newp; Point(p6) = { xc+ep_ass/(2.*rac3) , yc-ep_ass/2., 0., lcar } ;
+
+indice2++; c2[indice2]=newreg; Line(c2[indice2]) = { p1, p2 } ;
+indice2++; c2[indice2]=newreg; Line(c2[indice2]) = { p2, p3 } ;
+indice2++; c2[indice2]=newreg; Line(c2[indice2]) = { p3, p4 } ;
+indice2++; c2[indice2]=newreg; Line(c2[indice2]) = { p4, p5 } ;
+indice2++; c2[indice2]=newreg; Line(c2[indice2]) = { p5, p6 } ;
+indice2++; c2[indice2]=newreg; Line(c2[indice2]) = { p6, p1 } ;
+
+nreflecteur++; lbord2[nreflecteur]=newreg; 
+Line Loop(lbord2[nreflecteur]) = { c2[{ indice2-5:indice2 }] } ;
+refl[nreflecteur]=newreg; Plane Surface(refl[nreflecteur]) = { lbord2[nreflecteur] } ;
+
+
+Return
+
+/////////////////////
+Function pnl
+/////////////////////
+
+
+//*********
+// Hexagone
+//*********
+
+If(itype_PNL==0)
+
+lcar_pnl = lcar;
+
+p1=newp; Point(p1) = { xc+diam_pnl/rac3      , yc            , 0., lcar_pnl } ;
+p2=newp; Point(p2) = { xc+diam_pnl/(2.*rac3) , yc+diam_pnl/2., 0., lcar_pnl } ;
+p3=newp; Point(p3) = { xc-diam_pnl/(2.*rac3) , yc+diam_pnl/2., 0., lcar_pnl } ;
+p4=newp; Point(p4) = { xc-diam_pnl/rac3      , yc            , 0., lcar_pnl } ;
+p5=newp; Point(p5) = { xc-diam_pnl/(2.*rac3) , yc-diam_pnl/2., 0., lcar_pnl } ;
+p6=newp; Point(p6) = { xc+diam_pnl/(2.*rac3) , yc-diam_pnl/2., 0., lcar_pnl } ;
+
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p1, p2 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p2, p3 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p3, p4 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p4, p5 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p5, p6 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p6, p1 } ;
+
+npnl++; lbord3[npnl]=newreg; 
+Line Loop(lbord3[npnl]) = { c4[{ indice4-5:indice4 }] } ;
+pnl[npnl]=newreg; Plane Surface(pnl[npnl]) = { lbord3[npnl] } ;
+
+EndIf
+
+
+//*******
+// Cercle
+//*******
+
+If(itype_PNL==1)
+
+lcar_pnl = 0.5*diam_pnl;
+
+centre_pnl=newp; Point(centre_pnl) = { xc, yc, 0., lcar_pnl } ;
+//p_point = newreg ; Physical Point(p_point) = { centre_pnl } ;
+
+p1=newp; Point(p1) = { xc+diam_pnl/2.	, yc,		  0.,	 lcar_pnl } ;
+p2=newp; Point(p2) = { xc		, yc+diam_pnl/2., 0.,	 lcar_pnl } ;
+p3=newp; Point(p3) = { xc-diam_pnl/2.	, yc,		  0.,	 lcar_pnl } ;
+p4=newp; Point(p4) = { xc		, yc-diam_pnl/2., 0.,	 lcar_pnl } ;
+
+indice4++; c4[indice4]=newreg; Circle(c4[indice4]) = { p1, centre_pnl, p2 } ;
+indice4++; c4[indice4]=newreg; Circle(c4[indice4]) = { p2, centre_pnl, p3 } ;
+indice4++; c4[indice4]=newreg; Circle(c4[indice4]) = { p3, centre_pnl, p4 } ;
+indice4++; c4[indice4]=newreg; Circle(c4[indice4]) = { p4, centre_pnl, p1 } ;
+
+npnl++; lbord3[npnl]=newreg; 
+Line Loop(lbord3[npnl]) = { c4[{ indice4-3:indice4 }] } ;
+pnl[npnl]=newreg; Plane Surface(pnl[npnl]) = { lbord3[npnl] } ;
+
+EndIf
+
+
+//*********
+// Octogone
+//*********
+
+If(itype_PNL==2)
+
+lcar_pnl = 0.5*diam_pnl;
+
+p1=newp; Point(p1) = { xc+diam_pnl/2.	     , yc,		  	0.,  lcar_pnl } ;
+p2=newp; Point(p2) = { xc+diam_pnl/(2.*rac2) , yc+diam_pnl/(2.*rac2),   0.,  lcar_pnl } ;
+p3=newp; Point(p3) = { xc		     , yc+diam_pnl/2.,		0.,  lcar_pnl } ;
+p4=newp; Point(p4) = { xc-diam_pnl/(2.*rac2) , yc+diam_pnl/(2.*rac2),   0.,  lcar_pnl } ;
+p5=newp; Point(p5) = { xc-diam_pnl/2.	     , yc,		  	0.,  lcar_pnl } ;
+p6=newp; Point(p6) = { xc-diam_pnl/(2.*rac2) , yc-diam_pnl/(2.*rac2),   0.,  lcar_pnl } ;
+p7=newp; Point(p7) = { xc		     , yc-diam_pnl/2.,		0.,  lcar_pnl } ;
+p8=newp; Point(p8) = { xc+diam_pnl/(2.*rac2) , yc-diam_pnl/(2.*rac2),   0.,  lcar_pnl } ;
+
+
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p1, p2 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p2, p3 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p3, p4 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p4, p5 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p5, p6 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p6, p7 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p7, p8 } ;
+indice4++; c4[indice4]=newreg; Line(c4[indice4]) = { p8, p1 } ;
+
+
+npnl++; lbord3[npnl]=newreg; 
+Line Loop(lbord3[npnl]) = { c4[{ indice4-7:indice4 }] } ;
+pnl[npnl]=newreg; Plane Surface(pnl[npnl]) = { lbord3[npnl] } ;
+
+EndIf
+
+Return
+
+////////////////////////
+Function pompe_echangeur
+////////////////////////
+
+indice3++;
+
+centre4=newp; Point(centre4) = { xc, yc, h1b, lcar3 } ;
+
+p61=newp; Point(p61) = { xc+r5  , yc    , h1b, lcar3 } ;
+p62=newp; Point(p62) = { xc     , yc+r5 , h1b, lcar3 } ;
+p63=newp; Point(p63) = { xc-r5  , yc    , h1b, lcar3 } ;
+p64=newp; Point(p64) = { xc     , yc-r5 , h1b, lcar3 } ;
+
+c61=newreg; Circle(c61) = { p61, centre4, p62 } ;
+c62=newreg; Circle(c62) = { p62, centre4, p63 } ;
+c63=newreg; Circle(c63) = { p63, centre4, p64 } ;
+c64=newreg; Circle(c64) = { p64, centre4, p61 } ;
+
+pompeb[indice3]=newreg; Line Loop(pompeb[indice3]) = { c61 , c62 , c63 , c64  } ;
+surf5[indice3] =newreg; Plane Surface(surf5[indice3])  = { pompeb[indice3] } ;
+
+centre5=newp; Point(centre5) = { xc, yc, h1b+h4, lcar3 } ;
+
+p71=newp; Point(p71) = { xc+r5  , yc    , h1b+h4, lcar3 } ;
+p72=newp; Point(p72) = { xc     , yc+r5 , h1b+h4, lcar3 } ;
+p73=newp; Point(p73) = { xc-r5  , yc    , h1b+h4, lcar3 } ;
+p74=newp; Point(p74) = { xc     , yc-r5 , h1b+h4, lcar3 } ;
+
+c71=newreg; Circle(c71) = { p71, centre5, p72 } ;
+c72=newreg; Circle(c72) = { p72, centre5, p73 } ;
+c73=newreg; Circle(c73) = { p73, centre5, p74 } ;
+c74=newreg; Circle(c74) = { p74, centre5, p71 } ;
+
+l9 = newreg; Line(l9)   = { p61 , p71 } ;
+l10 = newreg; Line(l10) = { p62 , p72 } ;
+l11 = newreg; Line(l11) = { p63 , p73 } ;
+l12 = newreg; Line(l12) = { p64 , p74 } ;
+
+surf_lat9 = newreg; Line Loop(surf_lat9)   = { l9 , c71 , -l10 , -c61 } ; sl9[indice3]  = newreg; Ruled Surface(sl9[indice3])  = { surf_lat9  } ;
+surf_lat10 = newreg; Line Loop(surf_lat10) = { l10, c72 , -l11 , -c62 } ; sl10[indice3] = newreg; Ruled Surface(sl10[indice3]) = { surf_lat10 } ;
+surf_lat11 = newreg; Line Loop(surf_lat11) = { l11, c73 , -l12 , -c63 } ; sl11[indice3] = newreg; Ruled Surface(sl11[indice3]) = { surf_lat11 } ;
+surf_lat12 = newreg; Line Loop(surf_lat12) = { l12, c74 , -l9  , -c64 } ; sl12[indice3] = newreg; Ruled Surface(sl12[indice3]) = { surf_lat12 } ;
+
+centre6=newp; Point(centre6) = { xc, yc, h1b+h2, lcar3 } ;
+
+p81=newp; Point(p81) = { xc+r5  , yc    , h1b+h2, lcar3 } ;
+p82=newp; Point(p82) = { xc     , yc+r5 , h1b+h2, lcar3 } ;
+p83=newp; Point(p83) = { xc-r5  , yc    , h1b+h2, lcar3 } ;
+p84=newp; Point(p84) = { xc     , yc-r5 , h1b+h2, lcar3 } ;
+
+c81=newreg; Circle(c81) = { p81, centre6, p82 } ;
+c82=newreg; Circle(c82) = { p82, centre6, p83 } ;
+c83=newreg; Circle(c83) = { p83, centre6, p84 } ;
+c84=newreg; Circle(c84) = { p84, centre6, p81 } ;
+
+pompeh[indice3]=newreg; Line Loop(pompeh[indice3]) = { c81 , c82 , c83 , c84  } ;
+surf6[indice3] =newreg; Plane Surface(surf6[indice3])  = { pompeh[indice3] } ;
+
+l13 = newreg; Line(l13) = { p71 , p81 } ;
+l14 = newreg; Line(l14) = { p72 , p82 } ;
+l15 = newreg; Line(l15) = { p73 , p83 } ;
+l16 = newreg; Line(l16) = { p74 , p84 } ;
+
+surf_lat13 = newreg; Line Loop(surf_lat13) = { l13, c81 , -l14 , -c71 } ; sl13[indice3] = newreg; Ruled Surface(sl13[indice3]) = { surf_lat13 } ;
+surf_lat14 = newreg; Line Loop(surf_lat14) = { l14, c82 , -l15 , -c72 } ; sl14[indice3] = newreg; Ruled Surface(sl14[indice3]) = { surf_lat14 } ;
+surf_lat15 = newreg; Line Loop(surf_lat15) = { l15, c83 , -l16 , -c73 } ; sl15[indice3] = newreg; Ruled Surface(sl15[indice3]) = { surf_lat15 } ;
+surf_lat16 = newreg; Line Loop(surf_lat16) = { l16, c84 , -l13 , -c74 } ; sl16[indice3] = newreg; Ruled Surface(sl16[indice3]) = { surf_lat16 } ;
+
+Return
+
+
+/////////////////////////////
+// Generation des assemblages 
+/////////////////////////////
+
+   xc = x0;
+   yc = y0;
+   
+   nbass=0;
+   
+   R_ass2= R_ass*R_ass;
+   
+   ind_max = Floor(1.16*R_ass)+1;
+   
+
+For i In { -ind_max:ind_max }
+ For j In { -ind_max:ind_max }
+ 
+ R_ij2 = i*i+j*j+i*j;
+
+ If (R_ij2<=R_ass2)
+   xc = x0+i*0.5*rac3*pas_ass;
+   yc = y0+i*0.5*pas_ass+j*pas_ass;
+   Call assemblage;
+   nbass++;
+ EndIf
+ 
+ EndFor
+EndFor
+
+Printf(" %g assemblages créés " , nbass ) ;
+
+/////////////////////////////
+// Generation des reflecteurs 
+/////////////////////////////
+
+If (R_ref>0.)
+
+   xc = x0;
+   yc = y0;
+   
+   nbrefl=0;
+
+   R_ref2 = R_ref*R_ref;
+
+   ind_max = Floor(1.16*R_ref)+1;
+
+For i In { -ind_max:ind_max }
+ For j In { -ind_max:ind_max }
+ 
+ R_ij2 = i*i+j*j+i*j;
+
+ If (R_ij2>R_ass2)
+  If (R_ij2<=R_ref2)
+   xc = x0+i*0.5*rac3*pas_ass;
+   yc = y0+i*0.5*pas_ass+j*pas_ass;
+   Call reflecteur;
+   nbrefl++;
+  EndIf
+ EndIf
+ 
+ EndFor
+EndFor
+
+Printf(" %g reflecteurs créés " , nbrefl ) ;
+
+EndIf
+
+/////////////////////////////
+// Generation des P.N.L. 
+/////////////////////////////
+
+If (R_pnl>0.)
+
+   xc = x0;
+   yc = y0;
+   
+   nbpnl=0;
+   
+   R_pnl2=R_pnl*R_pnl;
+
+   ind_max = Floor(1.16*R_pnl)+1;
+
+For i In { -ind_max:ind_max }
+ For j In { -ind_max:ind_max }
+ 
+ R_ij2 = i*i+j*j+i*j;
+
+ If(R_ref==0.)
+  R_ref2 = R_ass2;
+ EndIf 
+ 
+ If (R_ij2>R_ref2)
+  If (R_ij2<=R_pnl2)
+   xc = x0+i*0.5*rac3*pas_ass;
+   yc = y0+i*0.5*pas_ass+j*pas_ass;
+   Call pnl;
+   nbpnl++;
+  EndIf
+ EndIf
+ 
+ EndFor
+EndFor
+
+Printf(" %g P.N.L créés " , nbpnl ) ;
+
+EndIf
+
+
+//////////////////////////////////////////
+// Generation de la cuve primaire (virole)
+//////////////////////////////////////////
+
+centre=newp; Point(centre) = { x0, y0, 0., lcar2 } ;
+
+p11=newp; Point(p11) = { x0+r1 , y0    , 0., lcar2 } ;
+p12=newp; Point(p12) = { x0    , y0+r1 , 0., lcar2 } ;
+p13=newp; Point(p13) = { x0-r1 , y0    , 0., lcar2 } ;
+p14=newp; Point(p14) = { x0    , y0-r1 , 0., lcar2 } ;
+
+c11=newreg; Circle(c11) = { p11, centre, p12 } ;
+c12=newreg; Circle(c12) = { p12, centre, p13 } ;
+c13=newreg; Circle(c13) = { p13, centre, p14 } ;
+c14=newreg; Circle(c14) = { p14, centre, p11 } ;
+
+virole=newreg; Line Loop(virole) = { c11 , c12 , c13 , c14  } ;
+
+/////////////////////////////////
+// Generation de la partie coeur
+/////////////////////////////////
+
+
+If (kle==1) // assemblages seuls
+inter_ass =newreg; Plane Surface(inter_ass)  = { virole , lbord[] } ;
+EndIf
+
+If (kle==3) // assemblages + reflecteurs
+inter_ass =newreg; Plane Surface(inter_ass)  = { virole , lbord[], lbord2[] } ;
+EndIf
+
+If (kle==5) // assemblages + PNL
+inter_ass =newreg; Plane Surface(inter_ass)  = { virole , lbord[], lbord3[] } ;
+EndIf
+
+If(kle==7) // assemblages + reflecteurs + PNL
+inter_ass =newreg; Plane Surface(inter_ass)  = { virole , lbord[], lbord2[], lbord3[] } ;
+EndIf
+
+
+If (i_mesh==0)
+
+Physical Line ("cuve_primaire_bas")  = { c11 , c12 , c13 , c14  } ;
+
+	      Physical Line ("ass")  = { c[] } ;
+If(R_ref>0.)  Physical Line ("refl") = { c2[] } ; EndIf
+If(R_pnl>0.)  Physical Line ("pnl")  = { c4[] } ; EndIf
+
+Physical Surface("inter_ass") = { inter_ass } ;
+
+
+EndIf
+
+
+If (i_mesh==1)
+
+Physical Surface("ass") = { ass[] } ;
+
+
+If(R_ref>0.)
+Physical Surface("refl") = { refl[] } ;
+EndIf
+
+If(R_pnl>0.)
+Physical Surface("pnl") = { pnl[] } ;
+EndIf
+
+
+Physical Surface("inter_ass") = { inter_ass } ;
+
+
+/////////////////////////////////
+// Génération du collecteur chaud
+/////////////////////////////////
+
+
+//*******************************************************************************
+// extension de la cuve primaire jusqu'a l'epaulement collecteur chaud (virole1)
+//*******************************************************************************
+
+centreb=newp; Point(centreb) = { x0, y0, h1b, lcar2 } ;
+
+p11b=newp; Point(p11b) = { x0+r1 , y0    , h1b, lcar2 } ;
+p12b=newp; Point(p12b) = { x0    , y0+r1 , h1b, lcar2 } ;
+p13b=newp; Point(p13b) = { x0-r1 , y0    , h1b, lcar2 } ;
+p14b=newp; Point(p14b) = { x0    , y0-r1 , h1b, lcar2 } ;
+
+c11b=newreg; Circle(c11b) = { p11b, centreb, p12b } ;
+c12b=newreg; Circle(c12b) = { p12b, centreb, p13b } ;
+c13b=newreg; Circle(c13b) = { p13b, centreb, p14b } ;
+c14b=newreg; Circle(c14b) = { p14b, centreb, p11b } ;
+
+virole1=newreg; Line Loop(virole1) = { c11b , c12b , c13b , c14b  } ;
+
+
+//********************************************
+// cuve du collecteur chaud (virole2b-virole2h)
+//********************************************
+
+p21=newp; Point(p21) = { x0+r2 , y0    , h1b, lcar2 } ;
+p22=newp; Point(p22) = { x0    , y0+r2 , h1b, lcar2 } ;
+p23=newp; Point(p23) = { x0-r2 , y0    , h1b, lcar2 } ;
+p24=newp; Point(p24) = { x0    , y0-r2 , h1b, lcar2 } ;
+
+c21=newreg; Circle(c21) = { p21, centreb, p22 } ;
+c22=newreg; Circle(c22) = { p22, centreb, p23 } ;
+c23=newreg; Circle(c23) = { p23, centreb, p24 } ;
+c24=newreg; Circle(c24) = { p24, centreb, p21 } ;
+
+virole2b=newreg; Line Loop(virole2b) = { c21 , c22 , c23 , c24  } ;
+
+centre3=newp; Point(centre3) = { x0, y0, h2+h1b, lcar3 } ;
+
+p31=newp; Point(p31) = { x0+r2 , y0    , h2+h1b, lcar3 } ;
+p32=newp; Point(p32) = { x0    , y0+r2 , h2+h1b, lcar3 } ;
+p33=newp; Point(p33) = { x0-r2 , y0    , h2+h1b, lcar3 } ;
+p34=newp; Point(p34) = { x0    , y0-r2 , h2+h1b, lcar3 } ;
+
+c31=newreg; Circle(c31) = { p31, centre3, p32 } ;
+c32=newreg; Circle(c32) = { p32, centre3, p33 } ;
+c33=newreg; Circle(c33) = { p33, centre3, p34 } ;
+c34=newreg; Circle(c34) = { p34, centre3, p31 } ;
+
+virole2h=newreg; Line Loop(virole2h) = { c31 , c32 , c33 , c34  } ;
+
+
+//********************************************
+// Generation du bcc (bccb-bcch)
+//********************************************
+
+centre2=newp; Point(centre2) = { x0, y0, h3, lcar } ;
+
+p41=newp; Point(p41) = { x0+r3  , y0    , h3, lcar } ;
+p42=newp; Point(p42) = { x0     , y0+r3 , h3, lcar } ;
+p43=newp; Point(p43) = { x0-r3  , y0    , h3, lcar } ;
+p44=newp; Point(p44) = { x0     , y0-r3 , h3, lcar } ;
+
+c41=newreg; Circle(c41) = { p41, centre2, p42 } ;
+c42=newreg; Circle(c42) = { p42, centre2, p43 } ;
+c43=newreg; Circle(c43) = { p43, centre2, p44 } ;
+c44=newreg; Circle(c44) = { p44, centre2, p41 } ;
+
+bccb=newreg; Line Loop(bccb) = { c41 , c42 , c43 , c44  } ;
+
+p51=newp; Point(p51) = { x0+r3  , y0     , h2+h1b, lcar2 } ;
+p52=newp; Point(p52) = { x0     , y0+r3  , h2+h1b, lcar2 } ;
+p53=newp; Point(p53) = { x0-r3  , y0     , h2+h1b, lcar2 } ;
+p54=newp; Point(p54) = { x0     , y0-r3  , h2+h1b, lcar2 } ;
+
+c51=newreg; Circle(c51) = { p51, centre3, p52 } ;
+c52=newreg; Circle(c52) = { p52, centre3, p53 } ;
+c53=newreg; Circle(c53) = { p53, centre3, p54 } ;
+c54=newreg; Circle(c54) = { p54, centre3, p51 } ;
+
+bcch=newreg; Line Loop(bcch) = { c51 , c52 , c53 , c54  } ;
+
+
+//********************************************
+// Generation des 6 echangeurs et des 3 pompes
+//********************************************
+
+For i In { 0:2 }  // Pompes
+
+  xc = (x0+r4)*Cos(i*2*Pi/3);
+  yc = (y0+r4)*Sin(i*2*Pi/3);
+
+Call pompe_echangeur ;
+ 
+EndFor
+
+
+alpha = Pi/6;
+
+For i In { 0:2 }  // Echangeurs_gauche
+
+  xc = (x0+r4)*Cos(i*2*Pi/3+alpha);
+  yc = (y0+r4)*Sin(i*2*Pi/3+alpha);
+
+Call pompe_echangeur ;
+ 
+EndFor
+
+For i In { 0:2 }  // Echangeurs_droite
+
+  xc = (x0+r4)*Cos(i*2*Pi/3-alpha);
+  yc = (y0+r4)*Sin(i*2*Pi/3-alpha);
+
+Call pompe_echangeur ;
+ 
+EndFor
+
+
+///////////////////////////////////////////////////////
+// Generation des surfaces et des volumes du collecteur
+///////////////////////////////////////////////////////
+
+l1 = newreg; Line(l1) = { p21 , p31 } ;  l5 = newreg; Line(l5) = { p41 , p51 } ; 
+l2 = newreg; Line(l2) = { p22 , p32 } ;  l6 = newreg; Line(l6) = { p42 , p52 } ; 
+l3 = newreg; Line(l3) = { p23 , p33 } ;  l7 = newreg; Line(l7) = { p43 , p53 } ; 
+l4 = newreg; Line(l4) = { p24 , p34 } ;  l8 = newreg; Line(l8) = { p44 , p54 } ; 
+
+l1b = newreg; Line(l1b) = { p11 , p11b } ;
+l2b = newreg; Line(l2b) = { p12 , p12b } ;
+l3b = newreg; Line(l3b) = { p13 , p13b } ;
+l4b = newreg; Line(l4b) = { p14 , p14b } ;
+
+surf_lat1 = newreg; Line Loop(surf_lat1) = { l1, c31 , -l2 , -c21 } ; sl1 = newreg; Ruled Surface(sl1) = { surf_lat1 } ;
+surf_lat2 = newreg; Line Loop(surf_lat2) = { l2, c32 , -l3 , -c22 } ; sl2 = newreg; Ruled Surface(sl2) = { surf_lat2 } ;
+surf_lat3 = newreg; Line Loop(surf_lat3) = { l3, c33 , -l4 , -c23 } ; sl3 = newreg; Ruled Surface(sl3) = { surf_lat3 } ;
+surf_lat4 = newreg; Line Loop(surf_lat4) = { l4, c34 , -l1 , -c24 } ; sl4 = newreg; Ruled Surface(sl4) = { surf_lat4 } ;
+
+surf_lat1b = newreg; Line Loop(surf_lat1b) = { l1b, c11b , -l2b , -c11 } ; sl1b = newreg; Ruled Surface(sl1b) = { surf_lat1b } ;
+surf_lat2b = newreg; Line Loop(surf_lat2b) = { l2b, c12b , -l3b , -c12 } ; sl2b = newreg; Ruled Surface(sl2b) = { surf_lat2b } ;
+surf_lat3b = newreg; Line Loop(surf_lat3b) = { l3b, c13b , -l4b , -c13 } ; sl3b = newreg; Ruled Surface(sl3b) = { surf_lat3b } ;
+surf_lat4b = newreg; Line Loop(surf_lat4b) = { l4b, c14b , -l1b , -c14 } ; sl4b = newreg; Ruled Surface(sl4b) = { surf_lat4b } ;
+
+surf_lat5 = newreg; Line Loop(surf_lat5) = { l5, c51 , -l6 , -c41 } ; sl5 = newreg; Ruled Surface(sl5) = { surf_lat5 } ;
+surf_lat6 = newreg; Line Loop(surf_lat6) = { l6, c52 , -l7 , -c42 } ; sl6 = newreg; Ruled Surface(sl6) = { surf_lat6 } ;
+surf_lat7 = newreg; Line Loop(surf_lat7) = { l7, c53 , -l8 , -c43 } ; sl7 = newreg; Ruled Surface(sl7) = { surf_lat7 } ;
+surf_lat8 = newreg; Line Loop(surf_lat8) = { l8, c54 , -l5 , -c44 } ; sl8 = newreg; Ruled Surface(sl8) = { surf_lat8 } ;
+
+surf1 =newreg; Plane Surface(surf1)  = { virole2b , pompeb[], virole1 } ;
+surf3 =newreg; Plane Surface(surf3)  = { virole2h , pompeh[], bcch } ;
+surf4 =newreg; Plane Surface(surf4)  = { bccb } ;
+
+collecteur[0] = newreg ;
+
+
+If (kle==1) // assemblages seuls
+Surface Loop(collecteur[0]) = { surf1, surf3, surf4, inter_ass,
+ 				ass[], 
+				sl1, sl2, sl3, sl4, sl1b, sl2b, sl3b, sl4b, sl5, sl6, sl7, sl8 ,
+				sl9[], sl10[], sl11[], sl12[],
+				sl13[], sl14[],	sl15[], sl16[]  } ;
+EndIf
+
+If (kle==3) // assemblages + reflecteurs
+Surface Loop(collecteur[0]) = { surf1, surf3, surf4, inter_ass,
+ 				ass[], refl[], 
+				sl1, sl2, sl3, sl4, sl1b, sl2b, sl3b, sl4b, sl5, sl6, sl7, sl8 ,
+				sl9[], sl10[], sl11[], sl12[],
+				sl13[], sl14[],	sl15[], sl16[]  } ;
+EndIf
+ 
+If (kle==5) // assemblages + PNL
+Surface Loop(collecteur[0]) = { surf1, surf3, surf4, inter_ass,
+ 				ass[], pnl[], 
+				sl1, sl2, sl3, sl4, sl1b, sl2b, sl3b, sl4b, sl5, sl6, sl7, sl8 ,
+				sl9[], sl10[], sl11[], sl12[],
+				sl13[], sl14[],	sl15[], sl16[]  } ;
+EndIf
+
+If(kle==7) // assemblages + reflecteurs + PNL
+Surface Loop(collecteur[0]) = { surf1, surf3, surf4, inter_ass,
+ 				ass[], refl[], pnl[], 
+				sl1, sl2, sl3, sl4, sl1b, sl2b, sl3b, sl4b, sl5, sl6, sl7, sl8 ,
+				sl9[], sl10[], sl11[], sl12[],
+				sl13[], sl14[],	sl15[], sl16[]  } ;
+EndIf
+
+vol = newreg ; Volume(vol) = { collecteur[] } ;
+
+
+Physical Surface("surf") = { surf1, surf3, surf4,
+			     sl1, sl2, sl3, sl4, sl5, sl6, sl7, sl8,
+			     sl9[ { 0:2 } ], sl10[ { 0:2 } ], sl11[ { 0:2 } ], sl12[ { 0:2 } ],
+			     sl13[], sl14[], sl15[], sl16[]  } ;
+
+Physical Surface("cuve_primaire_bas") = { sl1b, sl2b, sl3b, sl4b } ;
+
+Physical Surface("echg1") = { sl9[ { 3,6 } ], sl10[ { 3,6 } ], sl11[ { 3,6 } ], sl12[ { 3,6 } ]  } ;
+Physical Surface("echg2") = { sl9[ { 4,7 } ], sl10[ { 4,7 } ], sl11[ { 4,7 } ], sl12[ { 4,7 } ]  } ;
+Physical Surface("echg3") = { sl9[ { 5,8 } ], sl10[ { 5,8 } ], sl11[ { 5,8 } ], sl12[ { 5,8 } ]  } ;
+
+Physical Volume("dom") = { vol } ;
+
+EndIf
diff --git a/benchmarks/3d/raidisseur.geo b/benchmarks/3d/raidisseur.geo
new file mode 100644
index 0000000000000000000000000000000000000000..aa520f6a7599ef2c5ad5b73185ca19a8d6a260e0
--- /dev/null
+++ b/benchmarks/3d/raidisseur.geo
@@ -0,0 +1,30 @@
+
+x = 0; y = 0; z = 0; ep = 0.025; l = 0.4; r = 0.1; h = 6.5; lc = 1;
+
+p1 = newp; Point(p1) = {x, y, z, lc};
+p2 = newp; Point(p2) = {x, y + ep, z, lc};
+l1 = newl; Line(l1) = {p1, p2};
+tmp1[] = Extrude {l, 0, 0} { Line{l1}; };
+tmp2[] = Extrude {{0, 0, 1}, {x+l, y+ep+r/2, 0}, Pi/4} { Line{tmp1[0]}; };
+tmp3[] = Extrude {l/4, l/4, 0} { Line{tmp2[0]}; };
+tmp4[] = Extrude {{0, 0, 1}, {x+l+l/2, y+ep+r/2, 0}, -Pi/4} { Line{tmp3[0]}; };
+tmp5[] = Extrude {l/4, 0, 0} { Line{tmp4[0]}; };
+tmp6[] = Extrude {{0, 0, 1}, {x+l+l/2+l/4, y+ep+r/2, 0}, -Pi/4} { Line{tmp5[0]}; };
+tmp7[] = Extrude {l/4, -l/4, 0} { Line{tmp6[0]}; };
+tmp8[] = Extrude {{0, 0, 1}, {x+l+l+l/4, y+ep+r/2, 0}, Pi/4} { Line{tmp7[0]}; };
+tmp9[] = Extrude {l, 0, 0} { Line{tmp8[0]}; };
+
+p3 = newp; Point(p3) = {x,y-ep,z,lc};
+l2 = newl; Line(l2) = {p1,p3};
+tmp10[] = Extrude {l, 0, 0} { Line{l2}; };
+tmp11[] = Extrude {l+l/4, 0, 0} { Line{tmp10[0]}; };
+tmp12[] = Extrude {l, 0, 0} { Line{tmp11[0]}; };
+
+tmp13[] = Extrude {-l/4, 0, 0} { Line{l2}; };
+tmp14[] = Extrude {l/4, 0, 0} { Line{tmp12[0]}; };
+
+Extrude {0,0,h} {
+  Surface{tmp1[1],tmp2[1],tmp3[1],tmp4[1],tmp5[1],
+      tmp6[1],tmp7[1],tmp8[1],tmp9[1],tmp10[1],tmp11[1],tmp12[1],
+      tmp13[1], tmp14[1]}; 
+}
diff --git a/benchmarks/boolean/cubes.geo b/benchmarks/boolean/cubes.geo
new file mode 100644
index 0000000000000000000000000000000000000000..fd19cd1a359b5bedc302079e4c986af875e07e8a
--- /dev/null
+++ b/benchmarks/boolean/cubes.geo
@@ -0,0 +1,2 @@
+OCCShape("Box",{0,0,0,1,1,1},"none");
+OCCShape("Box",{1,0.5,0.5,2,1.5,1.5},"Union");
diff --git a/benchmarks/stl/car_body.stl b/benchmarks/stl/car_body.stl
new file mode 100644
index 0000000000000000000000000000000000000000..95f3f99d63a2c69d3cfd3f35449cef620949ec77
--- /dev/null
+++ b/benchmarks/stl/car_body.stl
@@ -0,0 +1,10789 @@
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diff --git a/benchmarks/stl/car_body_with_antenna.geo b/benchmarks/stl/car_body_with_antenna.geo
new file mode 100644
index 0000000000000000000000000000000000000000..211b30e07ce8ebc8d831b9b5fffa132c09a23e14
--- /dev/null
+++ b/benchmarks/stl/car_body_with_antenna.geo
@@ -0,0 +1,15 @@
+Merge "car_body.stl";
+
+ll = 0.1; // antenna length
+lc1 = ll / 10; // element size on antenna
+
+p1 = newp;
+Point(p1) = { -0.000210105 , 0.000769998 , 1.30307 , lc1 };
+p2 = newp;
+Point(p2) = { -0.000210105 , 0.000769998 , 1.30307 + ll , lc1 };
+l1 = newl;
+Line(l1) = { p1 , p2 }; 
+
+Mesh 2;
+Coherence Mesh;
+Save "car_body_with_antenna.msh";