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Reverting from the currently performed iteration |
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January 3, 2019, 01:36 |
Reverting from the currently performed iteration
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#1 | |
Senior Member
Alexander
Join Date: Apr 2013
Posts: 2,363
Rep Power: 34 |
Dear experts!
Is there any option to revert computation from current iteration (timestep)? I speak about transient simulations. This problem occurs when we use big timestep, the system generates sudden rare large heat source fluctuations. Energy is captured not accurately. The idea is to recalculate last iteration (timestep) but with smaller timestep size. The first solution idea was to use Adaptive Time Stepping and manipulate truncation error tolerance value. From Ansys Fluent User's Guide manual Quote:
Other solution idea was write data after each timestep, but it is very expensive in terms of computation time. So once again, is there any option to recalculate current timestep with smaller timestep size? best regards |
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January 6, 2019, 21:11 |
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#2 |
Senior Member
Alexander
Join Date: Apr 2013
Posts: 2,363
Rep Power: 34 |
any suggestions?
best regards |
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