Subsonic compressibe flow

Mahadev · December 27, 2017, 14:00

Hy
I am trying to do a simulation which involves subsonic compressible flow.I am a bit of a beginner in fluent.can anyone tell me what kind of solver should i use pressure based or density based??

Kirill-MIPT · December 28, 2017, 01:07

Hi! Use density based for compressible flows

Mahadev · December 28, 2017, 06:05

Thank you
I did that. I have the inlet velocity and I want to check outlet pressure what boundary conditions should i use to get a better convergence??? And can I use laminar flow for this kind of set up??

wasim_03 · December 28, 2017, 13:10

For Nozzle flow always specify pressure as boundary conditions....so specify inlet and outlet pressure condition to check Mach No. along nozzle axis.....

Mahadev · December 28, 2017, 16:39

Thank you
actually i am trying to do a simulation for a compressor. The flow is highly subsonic but the density is changing.Can you tell what boundary conditions would be appropriate for these kind of set up??

Kirill-MIPT · December 29, 2017, 02:15

Use the same static pressure and static temperature as in the inlet

Mahadev · December 29, 2017, 05:05

Thank you for helping me.

December 27, 2017, 14:00	Subsonic compressibe flow	#1
Mahadev New Member Mahdev Prasad Panda Join Date: Dec 2017 Posts: 10 Rep Power: 8	Hy I am trying to do a simulation which involves subsonic compressible flow.I am a bit of a beginner in fluent.can anyone tell me what kind of solver should i use pressure based or density based??

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December 28, 2017, 01:07		#2
Kirill-MIPT Member Kirill Borodin Join Date: Mar 2016 Posts: 60 Rep Power: 10	Hi! Use density based for compressible flows

December 28, 2017, 06:05		#3
Mahadev New Member Mahdev Prasad Panda Join Date: Dec 2017 Posts: 10 Rep Power: 8	Thank you I did that. I have the inlet velocity and I want to check outlet pressure what boundary conditions should i use to get a better convergence??? And can I use laminar flow for this kind of set up??

December 28, 2017, 13:10		#4
wasim_03 New Member wasim Join Date: Aug 2015 Posts: 9 Rep Power: 10	For Nozzle flow always specify pressure as boundary conditions....so specify inlet and outlet pressure condition to check Mach No. along nozzle axis.....

December 28, 2017, 16:39		#5
Mahadev New Member Mahdev Prasad Panda Join Date: Dec 2017 Posts: 10 Rep Power: 8	Thank you actually i am trying to do a simulation for a compressor. The flow is highly subsonic but the density is changing.Can you tell what boundary conditions would be appropriate for these kind of set up??

December 29, 2017, 02:15		#6
Kirill-MIPT Member Kirill Borodin Join Date: Mar 2016 Posts: 60 Rep Power: 10	Use the same static pressure and static temperature as in the inlet

December 29, 2017, 05:05		#7
Mahadev New Member Mahdev Prasad Panda Join Date: Dec 2017 Posts: 10 Rep Power: 8	Thank you for helping me.