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Search: Posts Made By: soumitra2102
Forum: Main CFD Forum September 11, 2019, 16:52
Replies: 10
Views: 1,015
Posted By soumitra2102
Backflow issue solved!

For me it was Eureka! I found it!!:)


The real reason for backflow at outlet of my geometry was NOT the geometry, boundary conditions or the physics itself.
It was a tiny parameter in the...
Forum: Main CFD Forum August 21, 2019, 08:12
Replies: 10
Views: 1,015
Posted By soumitra2102
Not exactly. I have given inlet steam mass flow...

Not exactly.
I have given inlet steam mass flow rate at a given pressure and temperature for a const. temperature C-shape tube. At outlet, I know pressure from the experiment.
My simulation should...
Forum: Main CFD Forum August 20, 2019, 22:45
Replies: 10
Views: 1,015
Posted By soumitra2102
Do backflow warnings cause hurdle for convergence?

I tried simply extruding (extend) the outlet domain BC. With application of slightly higher pressure at the new extended outlet, I could achieve approax. required actual outlet pressure at the actual...
Forum: Main CFD Forum August 10, 2019, 19:38
Replies: 10
Views: 1,015
Posted By soumitra2102
Yes, I am simulating condensation phenomenon...

Yes, I am simulating condensation phenomenon where stem is fully condensed to liquid water almost 70% of the tube length referenced from outlet.

P.S. the tube is vertical c-shaped (>3m long) with...
Forum: Main CFD Forum August 10, 2019, 19:16
Replies: 10
Views: 1,015
Posted By soumitra2102
How can I take care of numerical issue related to...

How can I take care of numerical issue related to backflow?

Thanks.
Forum: Main CFD Forum August 9, 2019, 22:09
Replies: 10
Views: 1,015
Posted By soumitra2102
Thanks for your reply. I understood that I...

Thanks for your reply.
I understood that I should extrude the domain as extension (without changing cross section) and use slightly different pressure than the actual know value that I have. (For my...
Forum: Main CFD Forum August 8, 2019, 22:07
Replies: 10
Views: 1,015
Posted By soumitra2102
Tackling Backflow using extended domain

I have seen somwhere that, if I want to completely avoid the backflow, I can extend the domain length wise as well as c/s area wise.
However, in that case don't you think I am messing with the...
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