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April 5, 2024, 07:30 |
Control Volume Analysis not adding up
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#1 |
New Member
Ludvig
Join Date: Oct 2023
Posts: 5
Rep Power: 2 |
Hello!
I am conducting a control volume analysis of a car simulation, but for some reason the forces don't add up. My process: I have set up a force report with all the car parts (from regions) and set the vector direction in the drag direction. I set up a similar force report with just walls, ground, inlet and outlet boundaries from regions as well. Same was done for downforce, just in the downforce direction. My problem: The drag force and downforce should equal the force reports of the domain in the same directions, but this is not the case. I get an error of approximately 10% for drag and 2% for downforce. Does anyone have a clue why? I'm thinking it might be the mesh near the wall, but with some refined mesh I still don't get much lower errors. This is for my master's thesis so it's important that the CV analysis is good for me to be able to trust the results. |
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Tags |
control volume, control volume analysis, cv analysis, drag |
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