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April 8, 2014, 06:59 |
Problem with residual
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#1 |
New Member
Alessandro
Join Date: Nov 2013
Posts: 2
Rep Power: 0 |
Hi, I am a naval engineer and work with Star ccm+ for simulate various hull.
I have a question: how can I reduced the residuals during the simulations? Thanks for the responses! |
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April 8, 2014, 09:55 |
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#2 |
Senior Member
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24 |
You have a transient simulation, so reducing the residuals in total doesn't really mean anything. You just want to ensure they converge in each timestep.
Looking at your second picture you can see your gas-liquid interface is being diffused by the grid coarseness at the sides. You need to capture the interface with a good number of cells. |
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April 10, 2014, 16:44 |
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#3 |
New Member
Alessandro
Join Date: Nov 2013
Posts: 2
Rep Power: 0 |
thanks! I understood the problem!
I have another one problem: when I use refine field fuction for the mesh, the calculus run for many minutes, but not arrive to the conclusion with an error for the memory ram. why? Thanks again! |
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April 10, 2014, 18:08 |
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#4 |
Senior Member
Join Date: Nov 2010
Location: USA
Posts: 1,232
Rep Power: 24 |
I don't quite understand the question. Can you rephrase it? Can you copy-and-paste the error?
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