O-grid Sholud ı make coordinate transformation

ferroburak · August 24, 2017, 11:22

Hi,

I have developed codes that can solve compressible&incompressible flows on cartesian grids. So far I have used staggered cartesian grids but using collacated grid should not be a big issue. I have tested my code on lid driven cavity benchmark results and it works.

To further develop the abilities of my code, I have generated an O-grid around a symmetric airfoil with algebraic grid technique(As described in Klaus Hoffmann CFD book volume 1 chapter 9). I can change the domain size and element size without an issue.

I want to know whether I should transform the O-grid to a rectangular domain to be able to analyse the fluid flow problem with Finite Volume method.

Can I modify the Navier stokes equations to work on the O-grid directly? In other words, can I can get a solution in the domain directly without transforming it to a rectangular domain?

I'm sending the link for the plot of the O-grid I have generated below:

https://postimg.org/image/ue7kz4k7j/

Thank you.

Edit: Sorry for the typo in the title 'Should I'.

ztdep · August 30, 2017, 01:00

yes, you can .
Discretize the N-S equation in a way like on a unstructured grid system.

August 24, 2017, 11:22	O-grid Sholud ı make coordinate transformation	#1
ferroburak New Member Burak Kaya Join Date: Nov 2011 Posts: 21 Rep Power: 14	Hi, I have developed codes that can solve compressible&incompressible flows on cartesian grids. So far I have used staggered cartesian grids but using collacated grid should not be a big issue. I have tested my code on lid driven cavity benchmark results and it works. To further develop the abilities of my code, I have generated an O-grid around a symmetric airfoil with algebraic grid technique(As described in Klaus Hoffmann CFD book volume 1 chapter 9). I can change the domain size and element size without an issue. I want to know whether I should transform the O-grid to a rectangular domain to be able to analyse the fluid flow problem with Finite Volume method. Can I modify the Navier stokes equations to work on the O-grid directly? In other words, can I can get a solution in the domain directly without transforming it to a rectangular domain? I'm sending the link for the plot of the O-grid I have generated below: https://postimg.org/image/ue7kz4k7j/ Thank you. Edit: Sorry for the typo in the title 'Should I'.

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August 30, 2017, 01:00		#2
ztdep Senior Member p ding Join Date: Mar 2009 Posts: 427 Rep Power: 19	yes, you can . Discretize the N-S equation in a way like on a unstructured grid system.