split the total drag on a ( Pressure drag +Frictional drag ).

samiraamiri · January 1, 2016, 02:32

Hi,

I am working on airfoil shape optimization, I need to split the total drag on a .( Pressure drag +Frictional drag ).
How can I separate each drag components from the OpenFoam?

Any help would be greatly appreciated

Best Regards
Samira

samiraamiri · January 6, 2016, 01:44

can anyone help me please?

tomf · January 7, 2016, 10:17

The forces functionObject should do this for you (Pressure and viscous forces will be given separately)

damu1414 · March 29, 2020, 04:30

Hi,

This seems to be a thread I have been looking for. Can anybody suggest how to calculate the viscous and pressure drag separately for flow over a cylinder?

I am simulating a 2D case in pisoFoam. I have copied the code to controlDict and run the case. In postProcessing/forceCoefficients, I get the drag coefficient for each deltaT whereas I need the viscous and pressure components. I understand it is possible to calculate these components using ParaView which I am not sure about.

I would be grateful to have your suggestions.

Thank you

January 1, 2016, 02:32	split the total drag on a ( Pressure drag +Frictional drag ).	#1
samiraamiri New Member samira Join Date: Feb 2015 Location: Iran Posts: 16 Rep Power: 11	Hi, I am working on airfoil shape optimization, I need to split the total drag on a .( Pressure drag +Frictional drag ). How can I separate each drag components from the OpenFoam? Any help would be greatly appreciated Best Regards Samira

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January 6, 2016, 01:44		#2
samiraamiri New Member samira Join Date: Feb 2015 Location: Iran Posts: 16 Rep Power: 11	can anyone help me please?

January 7, 2016, 10:17		#3
tomf Senior Member Tom Fahner Join Date: Mar 2009 Location: Breda, Netherlands Posts: 646 Rep Power: 32	The forces functionObject should do this for you (Pressure and viscous forces will be given separately)

March 29, 2020, 04:30		#4
damu1414 New Member damu Join Date: Feb 2017 Posts: 24 Rep Power: 9	Hi, This seems to be a thread I have been looking for. Can anybody suggest how to calculate the viscous and pressure drag separately for flow over a cylinder? I am simulating a 2D case in pisoFoam. I have copied the code to controlDict and run the case. In postProcessing/forceCoefficients, I get the drag coefficient for each deltaT whereas I need the viscous and pressure components. I understand it is possible to calculate these components using ParaView which I am not sure about. I would be grateful to have your suggestions. Thank you