ODE Solving in OpenFOAM

gezibash · August 17, 2017, 11:42

Hi,

I need to solve two ODEs during the main solving loop for my PDEs. I basically need to solve Newton's Equation F = ma and T = Ia for rigid body motion. I saw that there is a special solver for 6dof motion, but I would like to solve these two equations only.

I can't find any good tutorials online or some sample code for solving ODEs. Is there any sort of material online?

sepp.zell · August 21, 2017, 04:26

Had you had a look at
http://hassankassem.me/posts/ode/ ?

In general you can use any PDE solver for solving an ODE. This might be overdone, but it works. I only tried combining solving a PDE with an ODE. For this purpose I created a new field variable and added the additional equation in the solver code (only using the temporal derivative) resulting in a modified solver.

ansab_sindhu · February 14, 2022, 02:48

Were you able to integrate them, I am also interested in learning.

Quote:

Originally Posted by gezibash

Hi,

I need to solve two ODEs during the main solving loop for my PDEs. I basically need to solve Newton's Equation F = ma and T = Ia for rigid body motion. I saw that there is a special solver for 6dof motion, but I would like to solve these two equations only.

I can't find any good tutorials online or some sample code for solving ODEs. Is there any sort of material online?

ruloz · October 21, 2022, 20:40

Hi! ,
Do you have luck finding out how to solve and ODE inside the loop of a PDE?

This post http://hassankassem.me/posts/ode/ and this http://www.tfd.chalmers.se/~hani/kur...rtZongyuan.pdf publication explain how to solve an ODE but none of them eplain how to use it along with a PDE solver.

August 17, 2017, 11:42	ODE Solving in OpenFOAM	#1
gezibash New Member Join Date: Aug 2017 Posts: 2 Rep Power: 0	Hi, I need to solve two ODEs during the main solving loop for my PDEs. I basically need to solve Newton's Equation F = ma and T = Ia for rigid body motion. I saw that there is a special solver for 6dof motion, but I would like to solve these two equations only. I can't find any good tutorials online or some sample code for solving ODEs. Is there any sort of material online?

August 21, 2017, 04:26		#2
sepp.zell New Member Sebastian Join Date: Feb 2017 Posts: 22 Rep Power: 9	Had you had a look at http://hassankassem.me/posts/ode/ ? In general you can use any PDE solver for solving an ODE. This might be overdone, but it works. I only tried combining solving a PDE with an ODE. For this purpose I created a new field variable and added the additional equation in the solver code (only using the temporal derivative) resulting in a modified solver. alainislas likes this.

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October 21, 2022, 20:40		#4
ruloz New Member Raúl Bernal Join Date: Mar 2018 Posts: 3 Rep Power: 8	Hi! , Do you have luck finding out how to solve and ODE inside the loop of a PDE? This post http://hassankassem.me/posts/ode/ and this http://www.tfd.chalmers.se/~hani/kur...rtZongyuan.pdf publication explain how to solve an ODE but none of them eplain how to use it along with a PDE solver.