Drag coefficient and area

BradCFD · March 9, 2016, 19:37

Hi, new to OpenFOAM but have been going through the user guide. I am trying to build a case that will take a 3D model such as an .obj and run CFD simulations in order to generate a coefficient of drag value and area (assuming 1 unit = 1 meter in this case). I want to have that case run several simulations over various orientations of the object such as front, back, both sides, top, bottom, etc. What is the best way to take the model and generate these values?

EDIT: The main purpose is for simulating completely submerged submarines if that gives any more info.

Bazinga · March 11, 2016, 02:15

You can get the drag coeffiecient by adding a functionobject called forceCoeffs in the controlDict file. Search the Forum/Tutorials for information on how to use it.

March 9, 2016, 19:37	Drag coefficient and area	#1
BradCFD New Member Join Date: Mar 2016 Posts: 1 Rep Power: 0	Hi, new to OpenFOAM but have been going through the user guide. I am trying to build a case that will take a 3D model such as an .obj and run CFD simulations in order to generate a coefficient of drag value and area (assuming 1 unit = 1 meter in this case). I want to have that case run several simulations over various orientations of the object such as front, back, both sides, top, bottom, etc. What is the best way to take the model and generate these values? EDIT: The main purpose is for simulating completely submerged submarines if that gives any more info.

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March 11, 2016, 02:15		#2
Bazinga Senior Member Join Date: Jun 2012 Location: Germany, Bochum Posts: 230 Rep Power: 15	You can get the drag coeffiecient by adding a functionobject called forceCoeffs in the controlDict file. Search the Forum/Tutorials for information on how to use it.