Dear All, There is an example " navier-stokes-2d-SLEPc-complex.edp" available on ‘ Examples ’. The code is available here: FreeFem-sources/navier-stokes-2d-SLEPc-complex.edp at develop · FreeFem/FreeFem-sources · GitHub . My doubt is: What is the problem being solved? The governing equations and the…

Dear Sir, I read the paper you mentioned. For the paper, the 3D code is available here: GitHub - prj-/moulin2019al: Augmented Lagrangian Preconditioner for Hydrodynamic Stability Analysis . The 2D problem as mentioned in the above paper is as follows: [image] As you mentioned “ FreeFem-sources/na…

Is this code for the 2D problem of the mentioned journal paper? What is not clear in my previous message , please? I made a small mistake though, the bluff body is not a plate but a sphere in the 2D case example. Which boundary 1, 2 & 3 corresponds to which boundary of the computation domain lik…

Ok. So the base flow code is “ FreeFem-sources/navier-stokes-2d-PETSc.edp at develop · FreeFem/FreeFem-sources · GitHub ”?

That is correct. First run that (*-PETSc.edp), it will generate output files. Then run the eigenanalysis code (*-SLEPc-complex.edp). Either in 2D (sphere) or 3D (plate).

PETSc Example (navier-stokes-2d-SLEPc-complex.edp)

General Discussion

prj June 10, 2021, 5:10am 2

It is exactly the same problem as in Augmented Lagrangian preconditioner for large-scale hydrodynamic stability analysis - ScienceDirect, but in 2D instead of 3D.

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PETSc Example (navier-stokes-2d-SLEPc-complex.edp)

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