TAGGED: #meshingerror, fluent-mesh
April 7, 2023 at 10:03 amSaheed LawansonSubscriber
Quick model description: I have a solar cooker model which is basically
- a hollow cube (representing a wooden box) containing a thin hollow trapezoidal shaped (representing an absorber plate).
- The space between the box and absorber plate is filled with a geometry to represent the insulator.
- Also there's a frame (serves as the lid) which holds two thin rectangular geometries with a little space in between (to represent a double glazing).
- Finally the space between the glazing and the space in the absorber plate is filled with a geometry (to represent air).
Problem: I get this error message: Quality failure limits are exceeded on some solid bodies. See the Troubleshooting Section of the Meshing User Guide to improve quality whenever i try to generate a mesh on my model. I'm not sure what's causing this issue, but i think its as a result of my very thin absorber plate and the thin layer air in between the double glazing. Please how can i get past this without having to use an extremely small mesh that'll run forever in fluent, plus i can't even exceed 512000 elements with my student license
Questions i think i might get
1. What version of ANSYS are you using? ANSYS 2023 R1 Student
April 7, 2023 at 12:47 pmKeyur KanadeAnsys EmployeeFirst check the locations of the bad elements. Please see following video for the same.https://www.youtube.com/watch?v=ZDADSSN8hOsOnce you have locations, please check if you can improve mesh using different mesh sizing. Please see following video.https://www.youtube.com/watch?v=w4q6q8nKF3UYou can see more information about sizing at following link.https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v221/en/wb_msh/msh_Use_Adv_SF.html?q=sizingIf this does not help, please go to geometry and modify or simplify geometry at those locations in SpaceClaim.
April 10, 2023 at 11:34 amSaheed LawansonSubscriber
Hey thanks, i was able to simplify the model and it made my meshing easier. I am using shell conduction to model the conduction along the three layers of materials: aluminium (absorber plate), glass wool (insulation), wood (outer casing), but i have a question:
What i can picture from the info i got in the documentation is: Applying shell conduction to a surface basically extrudes a new layer from that surface and applies the selected material then simulates conduction through that extruded surface. Let’s say my geometry is a cube that’s open on the top (2D illustration below):
If i apply shell conduction to all outer sides of the cube including the bottom (a, b and c), does shell conduction just do the extrusion for each face and then simulate conduction or does it account for the edges also (d, e)?
| | | |
| | | |
| a | | b |
| ___ |_______________ ___| ____ |
| d | c | e |
| ___ |__________________ | ____ |
April 11, 2023 at 10:08 amRobAnsys Employee
There's a section in the documentation regarding how layers link. The extrusion (good way to explain) is virtual so the sections d & e don't really exist. But layers will link under some circumstances.
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