Incorrect vector display

kuppuraj · August 11, 2020, 12:16

Hi,

I have created the .dat file from Matlab which got four columns arranged as X Y U V.. The vector display which I have got in Matlab and tecplot is completely different. Please help me to resolve this problem..

I have attached the image file vector field obtained from Matlab and Tecplot.

novedevon · August 11, 2020, 19:40

It looks like the order/wrapping of the points in the file looks incorrect. The X&Y values likely are not in the same order as the U&V values.

In tecplot the index/i&j numbering starts from the lower left corner whereas matlab I believe starts in the upper left corner.

I would also suggest defining I&J values (matrix dimensions) to define a 2D ordered zone.

Hopefully that give you an idea of what to look for to fix your output.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
incorrect cg motion UDF sdof_properties::libudf on zone 6 (assuming no motion)	M.Magdy	Fluent UDF and Scheme Programming	9	April 4, 2023 12:00
udf problem about wall heat flux	stepanie	Fluent UDF and Scheme Programming	11	August 5, 2015 00:09
incorrect cg motion UDF sdof_properties::libudf on zone 6 (assuming no motion)	M.Magdy	Fluent UDF and Scheme Programming	0	March 22, 2013 06:58
Error Orient Face incorrect	MK	Siemens	5	January 19, 2009 08:46
LiftDrag utility from v12 to v141	cfdphil	OpenFOAM Running, Solving & CFD	2	December 5, 2007 05:49

August 11, 2020, 19:40		#2
novedevon Member Join Date: May 2013 Posts: 61 Rep Power: 12	It looks like the order/wrapping of the points in the file looks incorrect. The X&Y values likely are not in the same order as the U&V values. In tecplot the index/i&j numbering starts from the lower left corner whereas matlab I believe starts in the upper left corner. I would also suggest defining I&J values (matrix dimensions) to define a 2D ordered zone. Hopefully that give you an idea of what to look for to fix your output.