How to avoid random skews from thermal data on a pseudo steady solution -- CFD Online Discussion Forums

May 15, 2021, 10:08

How to avoid random skews from thermal data on a pseudo steady solution

parth_k

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Parth

Join Date: May 2019

Posts: 11

Rep Power: 6

Hi,

I'm encountering some random spikes like as seen in the figure attached. This nature is only visible with my wall based heat transfer variables dataset. The flow variables show no irregularities. I'm running a CHT 3D simulation for long enough times for it to reach pseudo-steady state using adaptive timestepping and on a super fine mesh. The convergence criteria is maintained at 1e-5 RMS.

Kindly suggest the ways this can be improvised. Residual and the test variable plot attached. Thanks.

Attached Images

	skew_variables.jpg (75.1 KB, 6 views)
	RMSresidual2.png (19.6 KB, 7 views)

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