Pressure farfield Boundary condition for OpenFoam

mechy · May 8, 2014, 09:37

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, 00:44

this B.C is used for compressible flow.

BSengupta · December 30, 2018, 09:21

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, 09:37	Pressure farfield Boundary condition for compressible solvers of OpenFoam	#1
mechy Senior Member Join Date: Jun 2011 Posts: 163 Rep Power: 14	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 04:26.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pressure boundary condition	C-H Kuo	Main CFD Forum	18	September 16, 2016 03:19
how to replace a shock tube high pressure port by a boundary condition?	immortality	OpenFOAM Pre-Processing	0	May 2, 2013 13:43
Water subcooled boiling	Attesz	CFX	7	January 5, 2013 03:32
pressure wall boundary condition in CFX	murx	CFX	4	October 9, 2012 06:50
high pressure boundary condition	fragzilla	CFX	5	September 14, 2012 02:40

May 14, 2014, 00:44		#2
mechy Senior Member Join Date: Jun 2011 Posts: 163 Rep Power: 14	this B.C is used for compressible flow.

December 30, 2018, 09:21		#3
BSengupta Member Bidesh Sengupta Join Date: Sep 2018 Location: Sngapore Posts: 76 Rep Power: 7	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