[petsc-users] Modification to ex11.c

[MUKKUND SUNJII]

Greetings, 

I had been working on ts/tutorials/ex11.c as part of my master’s thesis. 

In ex11.c, there is a 2D Shallow Water Model. I want to modify the model by adding a source term to the model. This source term would factor in the effects of bathymetry or bed elevation in addition to water height. 

I know how I will be able to achieve this if just use TSSetRHSFunction(). However ex11.c makes use of the Riemann Solver for the computation fluxes at the interfaces (therefore, it uses DMTSSetRHSFunctionLocal(dm, DMPlexTSComputeRHSFunctionFVM, user) ). 

Is there a routine that allows me to add a source term for every cell to the RHS function? 

Thank you in advance! 

Regards, 

Mukkund 
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