[SHAFKAT91]

Hello,

I have a given a fluent file by a friend. I am trying to find the same results he got. But I am noticing something strange with the boundary condition. If the initial temperature and boundary temperature is same, it gives the one type of results. But if the initial temperature and boundary temperature are different it gives a different set of results. The results are same for the temperature difference of 1000k and 1K. Can anyone please tell me why this is happening. Is this single precision, double precision type of problem?

[LuckyTran]

Check to make sure the results for each are converged.

[SHAFKAT91]

That is also a strange thing. My friend who did this problem said that the solution should converge after 10 to 12 iteration, but all I see is a flat curve with no change. Can you suggest me why this keeps happening?

[LuckyTran]

Originally Posted by SHAFKAT91

That is also a strange thing. My friend who did this problem said that the solution should converge after 10 to 12 iteration, but all I see is a flat curve with no change. Can you suggest me why this keeps happening?

Flat curve of a solution variable or the residual? Flat curve of the solution would mean it's already converged. If flat residuals, which residuals?

Did you load the .dat from your friend and try to continue running? Then the solution would already be converged and you would just continue running.

If you initialize it back to the same initial condition that your friend used, you should get the same result as your friend.