[bhargav1195]

Hello Everyone,

I am trying to generate a structured mesh for a rectangular domain with one Inlet and one Outlet. I have bolleaned(Cut) the Inlet and Outlet from the main rectangular domain. (Computational Domain is attached in Figure). After creating one volume, Transfinite Volume function is not working in Gmsh as it requires Volume with 5 or 6 faces only. However, if I try with TransfQuadTri function still I am unable to create 3D Hex mesh of Domain.

The script of above operation is as follow:
//
SetFactory("OpenCASCADE");
//+
Box(1) = {0, 0, 0, 10, 10, 10};
//+
Box(2) = {0.5, 0.5, 0.5, 0.2, 2, 2};
//+
Box(3) = {9, 7.5, 7.5, 0.2, 2, 2};
//+

//+
BooleanDifference{ Volume{1}; Delete; }{ Volume{2}; Delete; }
//+
BooleanDifference{ Volume{1}; Delete; }{ Volume{3}; Delete; }
//+
Physical Surface("Inlet") = {30};
//+
Physical Surface("Outlet") = {13};
//+
Physical Surface("wall") = {22, 19, 23, 24, 20, 21};
//+
Physical Volume("Domain") = {1};

Transfinite Line "*" = 10;
Transfinite Surface "*";
Recombine Surface "*";SetFactory("OpenCASCADE");
//+
Box(1) = {0, 0, 0, 10, 10, 10};
//+
Box(2) = {0.5, 0.5, 0.5, 0.2, 2, 2};
//+
Box(3) = {9, 7.5, 7.5, 0.2, 2, 2};
//+

//+
BooleanDifference{ Volume{1}; Delete; }{ Volume{2}; Delete; }
//+
BooleanDifference{ Volume{1}; Delete; }{ Volume{3}; Delete; }
//+
Physical Surface("Inlet") = {30};
//+
Physical Surface("Outlet") = {13};
//+
Physical Surface("wall") = {22, 19, 23, 24, 20, 21};
//+
Physical Volume("Domain") = {1};

Transfinite Line "*" = 10;
Transfinite Surface "*";
Recombine Surface "*";
Transfinite Volume "*";


//

Please suggest me some feasible solution to this problem.

Regards,
Bhargav