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Forum: FLUENT August 21, 2015, 04:46
Replies: 33
Views: 80,929
Posted By flotus1
By doing almost exactly what you described ;) ...

By doing almost exactly what you described ;)

Run the same simulation with at least three different time step sizes. Compare the solutions, e.g. by plotting a variable of interest over the time...
Forum: FLUENT August 20, 2015, 13:35
Replies: 33
Views: 80,929
Posted By flotus1
Only if the solution is independent of the time...

Only if the solution is independent of the time step size already for the larger time step.
Forum: FLUENT January 16, 2014, 06:35
Replies: 33
Views: 80,929
Posted By flotus1
If the flow is really time-dependent, you will...

If the flow is really time-dependent, you will get to the same point with 10 times less time steps if you choose a time step 10 times larger, provided both time step sizes are able to resolve the...
Forum: FLUENT January 16, 2014, 06:18
Replies: 33
Views: 80,929
Posted By flotus1
I think so. With larger time step, the solution...

I think so.
With larger time step, the solution evolves faster from the initial conditions towards the final solution.
But since you encountered difficulties with a steady-state solver, dont expect...
Forum: FLUENT July 26, 2013, 16:27
Replies: 33
Views: 80,929
Posted By flotus1
Again, I doubt that you want to resolve any...

Again, I doubt that you want to resolve any time-dependent effects in your simulation. Most probably, there are no transient effects in the flow you are simulating.
In this case, it is an...
Forum: FLUENT July 25, 2013, 17:42
Replies: 33
Views: 80,929
Posted By flotus1
With the same amount of iterations performed, why...

With the same amount of iterations performed, why should the solution be any different for two cases with identical setups?
Nevertheless, my spider senses tell me that the case you are running is...
Forum: FLUENT July 25, 2013, 10:32
Replies: 33
Views: 80,929
Posted By flotus1
In a transient simulation like this, you have 2...

In a transient simulation like this, you have 2 conditions that can break the iteration loop within a timestep: the residuals and the maximum number of inner iterations.

If you set the maximum...
Forum: FLUENT February 15, 2013, 04:05
Replies: 33
Views: 80,929
Posted By flotus1
As long as your solution changes while increasing...

As long as your solution changes while increasing the number of iterations, you havent found the "best" number.
It just means that your number of iterations is not sufficient to achieve convergence...
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