<div dir="ltr">Hello,<div><br></div><div>I am trying to mesh 1/8th of a hollow sphere which consists of three plane surfaces and two ruled surfaces, I am trying to get a mesh with all quads and 8-node Hexahedron elements however when I use transfinite surface and recombine surface and volume command ,tip of the sphere section is converted into prism elements that is what I don't want. </div><div><br></div><div>Please take a look at the geo file </div><div><br></div><div><div>Point(1) = {0, 0, 0, 1};</div><div>Point(2) = {1, 0, 0, 1};</div><div>Point(3) = {2, 0, 0, 1};</div><div>Point(4) = {0, 1, 0, 1};</div><div>Point(5) = {0, 2, 0, 1};</div><div>Point(6) = {0, 0, 1, 1};</div><div>Point(7) = {0, 0, 2, 1};</div><div><br></div><div>Line(1) = {4, 5};</div><div>Line(2) = {2, 3};</div><div>Line(3) = {6, 7};</div><div>Circle(4) = {5, 1, 3};</div><div>Circle(5) = {3, 1, 7};</div><div>Circle(6) = {5, 1, 7};</div><div>Circle(7) = {4, 1, 2};</div><div>Circle(8) = {2, 1, 6};</div><div>Circle(9) = {4, 1, 6};</div><div><br></div><div>Line Loop(10) = {6, -3, -9, 1};</div><div>Plane Surface(11) = {10};</div><div>Line Loop(12) = {1, 4, -2, -7};</div><div>Plane Surface(13) = {12};</div><div>Line Loop(14) = {3, -5, -2, 8};</div><div>Plane Surface(15) = {14};</div><div>Line Loop(16) = {9, -8, -7};</div><div>Ruled Surface(17) = {16};</div><div>Line Loop(18) = {6, -5, -4};</div><div>Ruled Surface(19) = {18};</div><div><br></div><div>Surface Loop(20) = {19, 11, 15, 13, 17};</div><div>Volume(21) = {20};</div><div><br></div><div>Transfinite Line{1:3} = 3 Using Progression 1;</div><div>Transfinite Line{4,6,7,9} = 6 Using Progression 1;</div><div>Transfinite Line{5,8} = 7 Using Progression 1;</div><div><br></div><div>Transfinite Surface{11,13,15,17,19};</div><div>Recombine Surface{11,13,15,17,19};</div><div><br></div><div>Transfinite Volume{21};</div><div>Recombine Volume{21};</div><div><br></div><div>--------------------------------------</div><div>The mesh I want is similar to this (<a href="http://res.cloudinary.com/engineering-com/image/upload/v1437412966/tips/Mesh_Sphere_h01ftf.jpg">http://res.cloudinary.com/engineering-com/image/upload/v1437412966/tips/Mesh_Sphere_h01ftf.jpg</a>). </div><div><br></div><div>Looking forward to your comments. Thanks in advance.</div><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Warm Regards,</div><div><br></div><div dir="ltr"><b>Rahul Sharma</b><div>Graduate Student </div><div>Structural Optimization and computaion mechanics</div><div>Delft University of Technology</div><div>Netherlands</div><div><br></div></div></div></div>
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