CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

Wrong result with bilinear interpolation

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   June 12, 2007, 06:02
Default Wrong result with bilinear interpolation
Posts: n/a
I am trying to do interpolation using bilinear interpolation, transfer u,v values from 1 structured grid to another.

I found that for different orientation of the pts, I may get coefficients which are of the order 1e-1 or 100. Those with 1e-1 give good ans but those of order 100 usually results in the wrong interpolated value.

I've check thru and it seems that there's no programming errors. Usually just 1 or 2 pts out of 100 doesn't interpolate well. Is this possible? Or is there anyway I can avoid it from happening?

Thank you.

  Reply With Quote

Old   June 12, 2007, 15:55
Default Re: Wrong result with bilinear interpolation
Ananda Himansu
Posts: n/a
Yes, it is entirely possible to get poor interpolation for some range of orientation of the mesh. Interpolation in more than one dimension is not as nicely behaved as the one-dimensional case. There is no watertight solution, but you may look at transfinite interpolation.
  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help on 2D interpolation in StarCCM+ madhuri Siemens 1 May 30, 2017 03:20
Single v.s. double precision Confused CFX 15 November 10, 2016 04:42
urgent help needed (rhie-chow interpolation problem) Ardalan Main CFD Forum 2 March 18, 2011 15:22
Surface interpolation schemes and parallelization jutta OpenFOAM Running, Solving & CFD 0 February 25, 2010 14:32
interpolation or mapping a result into another model amazdeh CFX 5 April 1, 2009 09:45

All times are GMT -4. The time now is 09:51.