Interpolation of look-up table

alirezame · October 27, 2015, 05:05

Hello,

I would appreciate if you could inform me how can I change the interpolation of a look-up table in cfx.
I generated a RGP table for CO2, and I need very accurate result. I think CFX use linear interpolation for proprieties. how can I increase the order of interpolation?
Many thanks in advance.

ghorrocks · October 27, 2015, 06:17

Yes, interpolation tables are linear. If that is not good enough then either put more points in or you will have to write your own function, probably in fortran, to do higher order interpolation. But more points sounds easier.

October 27, 2015, 05:05	Interpolation of look-up table	#1
alirezame Member Join Date: Nov 2013 Posts: 57 Rep Power: 12	Hello, I would appreciate if you could inform me how can I change the interpolation of a look-up table in cfx. I generated a RGP table for CO2, and I need very accurate result. I think CFX use linear interpolation for proprieties. how can I increase the order of interpolation? Many thanks in advance.

October 27, 2015, 06:17		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,729 Rep Power: 143	Yes, interpolation tables are linear. If that is not good enough then either put more points in or you will have to write your own function, probably in fortran, to do higher order interpolation. But more points sounds easier. alirezame likes this.

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