Having problem to converge laminar flow with 2nd order accuracy

amin.aerospace · May 24, 2017, 22:26

I am writing regarding the problem I have faced with solving Nozzle by FLUENT. I have tried to simulate nozzle plume impingement to the wall by using laminar and turbulent flow for first and second order accuracy. Everything goes well since I wanted to apply laminar flow (by the same mesh) to get second order accuracy and so far I couldn’t get any convergence in this issue. I have attached the figure of the nozzle problem which I have used in FLUENT with determined boundary condition. I would greatly appreciate it if anyone kindly gives me some feedback on this issue.

Светлана · May 25, 2017, 19:33

Instead of using second order straight away, try running it with first order first and then change the setting to second order and resume the calculation.

amin.aerospace · May 25, 2017, 21:07

Quote:

Originally Posted by Светлана

Instead of using second order straight away, try running it with first order first and then change the setting to second order and resume the calculation.

Dear Светлана, I tried before. Even though, First I used first order and after convergence I applied second order, I couldn't get any convergence so that is why I am so confused.

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May 25, 2017, 19:33		#2
Светлана Senior Member Svetlana Tkachenko Join Date: Oct 2013 Location: Australia, Sydney Posts: 407 Rep Power: 14	Instead of using second order straight away, try running it with first order first and then change the setting to second order and resume the calculation.