Adding new DRAG MODEL for TwoPhaseEulerFoam In OpenFOAM 2.3.x

vishal3 · September 10, 2014, 02:22

Hi all,

I am using twoPhaseEulerFoam (OF 2.3.x, OS: openSUSE 12.3) for solving bubble column. In this solver I want to provide CONSTANT DRAG COEFFICIENT, unlike CONSTANT LIFT/VIRTUAL MASS COEFFICIENT, for the simulations.
Can anyone help me in developing constantDragCoefficient files. Also what are the necessary changes required in main solver???
Please let me know whether anybody has done it earlier??

GerhardHolzinger · September 11, 2014, 08:08

You don't have to change anything in the main solver, this is one of the beautiful things about object-oriented programming.

Copy the SchillerNaumann folder in dragModels
Rename your copy of SchillerNaumann
1. Rename the folder
2. Rename the files
3. Rename the namespace (use find&replace)
Change the value returned by CdRe() to your needs
Include your new drag model to interfacialModels/Make/files in order to get it compiled
Maybe, copy the whole interfacialModels folder to some location in user-2.3/ to keep your OpenFOAM installation sanitary, i.e. your modified solvers/libraries should reside in the user-2.3 folder.
Maybe, change the LIB entry in files in order to not to overwrite the original library.
1. Maybe change from FOAM_LIBBIN to FOAM_USER_LIBBIN to keep your OpenFOAM installation sanitary
2. Maybe change the name of the library to make clear it is a user modified library

September 10, 2014, 02:22	Adding new DRAG MODEL for TwoPhaseEulerFoam In OpenFOAM 2.3.x	#1
vishal3 New Member Vishal Join Date: Feb 2013 Posts: 28 Rep Power: 13	Hi all, I am using twoPhaseEulerFoam (OF 2.3.x, OS: openSUSE 12.3) for solving bubble column. In this solver I want to provide CONSTANT DRAG COEFFICIENT, unlike CONSTANT LIFT/VIRTUAL MASS COEFFICIENT, for the simulations. Can anyone help me in developing constantDragCoefficient files. Also what are the necessary changes required in main solver??? Please let me know whether anybody has done it earlier??

September 11, 2014, 08:08		#2
GerhardHolzinger Senior Member Gerhard Holzinger Join Date: Feb 2012 Location: Austria Posts: 342 Rep Power: 28	You don't have to change anything in the main solver, this is one of the beautiful things about object-oriented programming. Copy the SchillerNaumann folder in dragModels Rename your copy of SchillerNaumann Rename the folder Rename the files Rename the namespace (use find&replace) Change the value returned by CdRe() to your needs Include your new drag model to interfacialModels/Make/files in order to get it compiled Maybe, copy the whole interfacialModels folder to some location in user-2.3/ to keep your OpenFOAM installation sanitary, i.e. your modified solvers/libraries should reside in the user-2.3 folder. Maybe, change the LIB entry in files in order to not to overwrite the original library. Maybe change from FOAM_LIBBIN to FOAM_USER_LIBBIN to keep your OpenFOAM installation sanitary Maybe change the name of the library to make clear it is a user modified library maalan, BlnPhoenix and ronithstanly like this.

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