What is the difference between Non-staggered and Collocated grid?

carl jung · January 23, 2017, 14:59

Hi all,

What is the difference between Non-staggered and Collocated grid?

According to Solution of Navier-Stokes equations on non-staggered grid(Date, 1992), ‘non-staggered’ grid arrangement, in which the velocities and the pressure are stored at the same location, that is, at the grid node.

According to CFD-Online Wiki, In collocated grid storage all flow variables are stored at the same locations.

I guess all the variables are stored at the grid node in non-staggered grid, and all the variables are stored at the same location(no matter where that is) in the collocated grid. Am I right?

If the variables are stored at the grid nodes, I wonder if I need to say just 'non-staggered grid', or 'collocated and non-staggered grid'.

Any comments would be appreciated.

Carl

FMDenaro · January 23, 2017, 15:11

According to the book of Peric & Ferziger, colocated grid and non-staggered grid are the same.

carl jung · January 23, 2017, 15:39

Thank you!

January 23, 2017, 14:59	What is the difference between Non-staggered and Collocated grid?	#1
carl jung New Member carl jung Join Date: Mar 2016 Posts: 15 Rep Power: 10	Hi all, What is the difference between Non-staggered and Collocated grid? According to Solution of Navier-Stokes equations on non-staggered grid(Date, 1992), ‘non-staggered’ grid arrangement, in which the velocities and the pressure are stored at the same location, that is, at the grid node. According to CFD-Online Wiki, In collocated grid storage all flow variables are stored at the same locations. I guess all the variables are stored at the grid node in non-staggered grid, and all the variables are stored at the same location(no matter where that is) in the collocated grid. Am I right? If the variables are stored at the grid nodes, I wonder if I need to say just 'non-staggered grid', or 'collocated and non-staggered grid'. Any comments would be appreciated. Carl

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January 23, 2017, 15:11		#2
FMDenaro Senior Member Filippo Maria Denaro Join Date: Jul 2010 Posts: 6,897 Rep Power: 73	According to the book of Peric & Ferziger, colocated grid and non-staggered grid are the same.

January 23, 2017, 15:39		#3
carl jung New Member carl jung Join Date: Mar 2016 Posts: 15 Rep Power: 10	Thank you!