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July 15, 2018, 09:36 |
Convergence Problem - Transient Simulation
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#1 |
New Member
gemxx
Join Date: Feb 2015
Posts: 28
Rep Power: 11 |
Hi all,
The residuals are about 10^-6 at the end of steady simulation. After that, I start the unsteady(transient) simulation by using steady simulation data as input. The residuals should continue to decrease from 10^-6 to lower values. But they rapidly increase to 10^-1. Then, they slowly goes to 10^-6 within 20 inner iterations. My purpose is to reach 10^-9 level convergence at least. It can be possible to achieve this by using 10^-6 level steady simulation convergence. But I don't understand why the transient simulation rapidly increase to 10^-1 after steady simulation. I send a photo of the residuals in attachment. Could you please tell me the reasons of this situation ? https://ibb.co/cxKOBo I want the transient simulation residuals to continue decreasing after the steady simulation like that : https://ibb.co/e7jnMo |
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