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April 30, 2004, 06:11 |
problem withcontinuity residual
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#1 |
Guest
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I have a questions.
First I did simulation and was monitoring the residuals. Contuinty equations reached 10^-5 and epsilon and k recahed 10^¯4 after say 2000 iterations then I did another 2000 iterations, what I found was the continuity residual suddenly becomes strted incresing 10^-4 and k,epsilon was 10^-6. The question is why does continuity residual increased. |
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April 30, 2004, 06:36 |
Re: problem withcontinuity residual
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#2 |
Guest
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Now I have another problem where the continuity,epsilon is flutuating periodically with no sign of convergence at all.
bob |
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April 30, 2004, 06:50 |
Re: problem withcontinuity residual
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#3 |
Guest
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Explain what you are trying to model. Are you modelling steady state?
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April 30, 2004, 08:10 |
Re: problem withcontinuity residual
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#4 |
Guest
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Yes I am modelling steady State. Its about flow around abstacles. bob
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April 30, 2004, 08:17 |
Re: problem withcontinuity residual
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#5 |
Guest
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Have you tried running this with the transient solver.
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April 30, 2004, 08:40 |
Re: problem withcontinuity residual
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#6 |
Guest
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Hi
why should I run transients when the case is steadyState? Will it be helpful. Pratap |
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April 30, 2004, 16:06 |
Re: problem withcontinuity residual
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#7 |
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Is there any seperation zone (or recirculation zone) after the abstacles? Did you get to check which node produces the highest residual? Is that node located inside the recirculation zone?
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May 10, 2004, 10:52 |
Re: problem withcontinuity residual
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#8 |
Guest
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Is your case realy steady state or highly turbulent?
At high rates of turbulence a unsteady scheme should be used, because of fluctuation velocities and possible swirls! regards zachi |
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