Pressure farfield Boundary condition for OpenFoam

mechy · May 8, 2014, 10:37

I am trying to resolve the steady compressible flow around an airfoil. I need a B.C similar to Pressure farfield BC in FLUENT.
does this BC exist in OpenFoam ?

The definition of this BC in the fluent manual is:

Pressure far-field conditions are used to model a free-stream condition at infinity, with free-stream Mach number and static conditions being specified. The pressure far-field boundary condition is often called a characteristic boundary condition, since it uses characteristic information (Riemann invariants) to determine the flow variables at the boundaries.

for more information about the Calculation Procedure at Pressure Far-Field Boundaries please see the below link

http://aerojet.engr.ucdavis.edu/flue...ug/node242.htm

Sincerely

mechy · May 14, 2014, 01:44

this B.C is used for compressible flow.

BSengupta · December 30, 2018, 10:21

Hi!!

I am having doubt, if you kindly help me to clarify those, it will be very useful. I have spherical mesh domain and at the center I have a plate and I wish to compute aerodynamic coefficients at different conditions. I have to use compressible flow. I am using freestram as BC for p and U, but not sure as I am getting diverged. Also I see negative k and epsilon (which is wrong). How can I calculate k and epsilon for farfield. Thank you very much. And happy new year. Bye

May 8, 2014, 10:37	Pressure farfield Boundary condition for compressible solvers of OpenFoam	#1
mechy Senior Member Join Date: Jun 2011 Posts: 163 Rep Power: 16	I am trying to resolve the steady compressible flow around an airfoil. I need a B.C similar to Pressure farfield BC in FLUENT. does this BC exist in OpenFoam ? The definition of this BC in the fluent manual is: Pressure far-field conditions are used to model a free-stream condition at infinity, with free-stream Mach number and static conditions being specified. The pressure far-field boundary condition is often called a characteristic boundary condition, since it uses characteristic information (Riemann invariants) to determine the flow variables at the boundaries. for more information about the Calculation Procedure at Pressure Far-Field Boundaries please see the below link http://aerojet.engr.ucdavis.edu/flue...ug/node242.htm Sincerely Last edited by mechy; May 9, 2014 at 05:26.

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May 14, 2014, 01:44		#2
mechy Senior Member Join Date: Jun 2011 Posts: 163 Rep Power: 16	this B.C is used for compressible flow.

December 30, 2018, 10:21		#3
BSengupta Member Bidesh Sengupta Join Date: Sep 2018 Location: Sngapore Posts: 76 Rep Power: 9	Hi!! I am having doubt, if you kindly help me to clarify those, it will be very useful. I have spherical mesh domain and at the center I have a plate and I wish to compute aerodynamic coefficients at different conditions. I have to use compressible flow. I am using freestram as BC for p and U, but not sure as I am getting diverged. Also I see negative k and epsilon (which is wrong). How can I calculate k and epsilon for farfield. Thank you very much. And happy new year. Bye