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Forum: Fluent UDF and Scheme Programming May 28, 2012, 17:38
Replies: 17
Views: 6,542
Posted By Patrick1
Decrease your timestep, start with 0.001 s...

Decrease your timestep, start with 0.001 s perhaps and see what happens.
Forum: Fluent UDF and Scheme Programming May 28, 2012, 17:36
Replies: 17
Views: 6,542
Posted By Patrick1
Answer to your PM about convergence

Hi, sorry for late reply I've been very busy.

When you run a CFD simulation, you are trying to iteratively solve a set of equations.

As you know, when you start a CFD simulation, you...
Forum: Fluent UDF and Scheme Programming May 11, 2012, 07:01
Replies: 17
Views: 6,542
Posted By Patrick1
Outflow is your boundary condition I guess? I...

Outflow is your boundary condition I guess? I don't think Outflow deals well with reversed flow, check the manual, has some little graphs showing what flows aren't good for this BC. As far as I know,...
Forum: Fluent UDF and Scheme Programming May 10, 2012, 13:13
Replies: 17
Views: 6,542
Posted By Patrick1
Change to that, see if it makes any difference....

Change to that, see if it makes any difference. Your graph is quite confusing, start with a simpler version? Also a graph of the temperature at the boundary over time would be easier to understand...
Forum: Fluent UDF and Scheme Programming May 10, 2012, 00:49
Replies: 17
Views: 6,542
Posted By Patrick1
You will need something like: ...

You will need something like:

t=CURRENT_TIME;

if t<100;
Temp=300;

if t<700;
Temp=300+Gradient*(t-100);
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