Eyüb Canli

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Questions related from Eyüb Canli

SIMPLE pressure-velocity coupling algorithm yields too big pressure values that needs to be relaxed with 0.001?

Dear all, I am using Patankar's SIMPLE algorithm for velocity pressure coupling in a turbulent pipe flow. When I calculate pressure values for correcting velocities, I find pressure values that...

15 May 2020 6,160 0 View

Why Patankar oppose under-relaxing velocity corrections while more recent resources recommend under-relaxation both velocity and pressure corrections?

In the book of Patankar, it is recommended to under-relax pressure correction but same is not said for velocity correction. Instead, it is said that velocity correction should not be relaxed. But...

23 December 2019 1,967 0 View

What should be the reason for too big pressure correction values during SIMPLE?

Dear All, For turbulent pipe flow, I used "exponntial discretization" explained in Patankar (Finite Volume Method - SIMPLE velocity pressure coupling). My problem is, pressure correction values...

23 December 2019 910 0 View

Is pressure poisson equation different from the pressure correction equation that i derived from continuity?

I am trying to apply SIMPLE of Patankar but I have problems related to having too big values of pressure correction. Is pressure poisson equation different from the pressure correction equation...

23 December 2019 9,217 0 View

What might be the sequence for calculating TKE and epsilon?

I wrote a CFD code in Delphi for turbulent axisymmetrical pipe flow (incompressible - SIMPLE - exponential discretization - staggered grid). Epsilon diverge during Gauss-Seidel point to point...

13 December 2019 7,349 3 View