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[ANSYS Meshing] Meshing a wedge-wire screen: in 2D works fine, in 3D lasts for ages. |
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#1 |
New Member
Jacob
Join Date: Oct 2015
Location: Warsaw, Poland
Posts: 5
Rep Power: 10 ![]() |
Dear community,
I want to model a flow through an industrial filter which consists of wedge-wire screen. It is composed of tiny triangular wires (1x2mm) arranged radially, and the gap between each is only 30 um. I've made a model in 3D CAD*symmetrical problem) and extracted the volume for Ansys Meshing. I'm trying to mesh the model, but since the geometry is quite complex, I split the body into 4 and meshed separately. The only problematic geometry is the screen. I tried various methods (automatic, multizone, tets) and none gave satisfactory results. When I set "proximity and curvature" adv. size function, the process lasts forever (left it overnight, it blocks on "preparing to model boundary for part" or on blank "overall process". Intel Core i5, 8GB RAM, Win8.1 64 bit). When I turn "curvature" only, the mesh's quality is very poor (only one cell throughout the big gap). To simplify the problem, I've prepared a 2D version of the screen, which is a cross-section of the screen (normal to the main axis) and tried to mesh it with proximity and curvature on (automatic, set relevance to 0, relevance center=fine, smoothing=high, span angle=fine, the sizes=default and num cells across the gap=8). The result is much better (80514 elements), there are more cells across the crucial gaps. Now, since the problem must be solved in 3D (simultaneous radial and axial flow), I would like to transfer the 2D mesh onto the body, for example as a sweep (supposing multizone?). Any fresh ideas? Ultimately, I'm planning to solve ~3-4 mln elements mesh. And one more question: If I joined the split body into one in DesignModeller (via Form New Part command), would Meshing automatically "know" that there is full continuity of fluid between the bodies and match the mesh? Thanks in advance for help (it is a part of my BSc thesis). ![]() I enclose some photos: ![]() EDIT: patch independent mesh generation lasts forever too. |
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#2 |
Member
Frank Weise
Join Date: Mar 2009
Location: Germany
Posts: 55
Rep Power: 17 ![]() |
Hi kubawlo,
in my opinion your mesh of the wedges are to rough. A better way is to simulate 1 wedge and with the simulated parameters would i use a porous domain to emulate the region of wedges. regards Frank |
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#3 | |
New Member
Jacob
Join Date: Oct 2015
Location: Warsaw, Poland
Posts: 5
Rep Power: 10 ![]() |
Quote:
![]() ![]() ![]() Then, I use this coefficient in porous domain? What should be the thickness of the domain? Maybe the same as the height of triangle? And how about meshing in Icem, maybe It could handle such a specific geometry? Last edited by kubawlo; October 13, 2015 at 18:52. |
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#4 | |
Member
Frank Weise
Join Date: Mar 2009
Location: Germany
Posts: 55
Rep Power: 17 ![]() |
Hi kubawlo,
Quote:
I think ICEM can handle the geometry but this is not the point. Is your computer able to solve meshes with approx. >5Mio elements? You need at least 5-8 elements across the smallest gap (It depents on your fluid velocity, laminar or turbulent flow)! Maybe you have to take a mesh sensitivity analysis! regards Frank |
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#5 | |
New Member
Jacob
Join Date: Oct 2015
Location: Warsaw, Poland
Posts: 5
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Quote:
But the idea of porosity sounds good too, I have to read more about it. Cheers! |
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#6 |
New Member
Join Date: Dec 2010
Posts: 8
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Which version of ANSYS are you using?
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#7 |
New Member
Jacob
Join Date: Oct 2015
Location: Warsaw, Poland
Posts: 5
Rep Power: 10 ![]() |
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#8 |
New Member
Chikaoui Ayoub
Join Date: Apr 2022
Posts: 1
Rep Power: 0 ![]() |
Hello sir,
Please could you help me with a tutorial to make a wedge wire screen using solidworks software i'm preparing a master degree in university and i need to elaborate a screen using solidworks to finish my moduls is it possible plz. Regards. Chikaouimoufdi@gmail.com. |
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Tags |
meshing in 3d, micrometer, screen, small gap, wire |
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