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[Zoheir Khademian <question695542@xxxxxxxxxxxxxxxxxxxxx>]

Question #695542 on Yade changed:
https://answers.launchpad.net/yade/+question/695542

Description changed to:
I am trying to simulate advection with a hot gas flowing though a cold packing. I used this example [1] and only modified the fluid properties to represent vapor. I used fluid density of 0.013 kg/m3 and heat capacity of 1996 J/kgK and viscosity of 0.00013 pa.s. The model becomes unstable. 
I reduced the timestep by two orders of magnitude and still no luck. So, I was wondering if there is any other parameters I should modify to make the model stable. 

One more question: How can I specify different thermal properties (like
conductivity) to different spheres in the model?

Thanks - Zoheir

[1] https://gitlab.com/yade-
dev/trunk/-/blob/master/examples/ThermalEngine/flowScenario.py

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