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

How to extract streamlines from huge files?

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

LinkBack Thread Tools Display Modes
Old   August 2, 2000, 21:29
Default How to extract streamlines from huge files?
Markus Weber
Posts: n/a
I am trying to take advantage of an academic collaboration I just got involved in lately.

I am inexperienced in CFD - I know pretty well what it is and how some parts of it work.

A professor from NC State University sent me a huge data file containing 4 blocks. Each block contains fluid dynamic data for meshes in the size between 81x81 and 201x137. The flow is axisymmetric along the x axis, transonic and turbulent. The data list position(x,y), pressure, temperature, density, vlocities (u,v), and shear stress as well as dissipation rate for each knot on these four meshes.

MY QUESTION: Using what software could I read in these data and how could I extract p,T,etc. profiles along streamlines from these data? A program such as Excel does not even read in the 14 MB file completely. I am well aware that Excel would not really be an option.
  Reply With Quote

Old   August 2, 2000, 22:49
Default Re: How to extract streamlines from huge files?
John C. Chien
Posts: n/a
(1). If you have the data files, then you can try some of the commercial post-processor programs. All you need to do is to make sure that these data are put in the right format for the post-processor program to read in. (a common format is the plot3d format) So, you may have to write a program to re-arrange the file in the right format.( there is a possibility that the output files are already in this format, if it is using a popular cfd code.) (2). Most of these post-processing program are professional programs, so you don't have to worry about the capability at all. There are enough options for you to plot the results. (3). Take time to visit the home pages of these vendors listed in the front page here. (3). I think, most provide demo program.
  Reply With Quote

Old   August 3, 2000, 04:20
Default Re: How to extract streamlines from huge files?
Posts: n/a
Dear Friend, There are many software that can be used to compute or to analysis these data especially for computationally fluid dynamic about streamline or 3D plot. You can use Tecplot software to show or to analysis your data. It can profile the streamline or 3D plot.

In other way, you can change your data in Matlab source code. This software can be used to get contour profile, streamline (vector plot), and mesh plot, etc.

  Reply With Quote

Old   August 3, 2000, 09:28
Default Re: How to extract streamlines from huge files?
Kai Kang
Posts: n/a
perhaps you could try Tecplot according to the data format you described. If I remember right, you could display the velocity vectors in your 2D mesh and overlay it with pressure or temperature contours. Then I think Tecplot can compute the streamline for you, but if you want to have the numerical data of P/T along the streamline you might need to do some programming yourself with the data.
  Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
UDF issue MASOUD Fluent UDF and Scheme Programming 14 December 6, 2012 14:39
critical error during installation of openfoam Fabio88 OpenFOAM Installation 21 June 2, 2010 03:01
OF 1.6 | Ubuntu 9.10 (64bit) | GLIBCXX_3.4.11 not found piprus OpenFOAM Installation 22 February 25, 2010 14:43
Problems in compiling paraview in Suse 10.3 platform chiven OpenFOAM Installation 3 December 1, 2009 08:21
OpenFOAM15 paraFoam bug koen OpenFOAM Bugs 19 June 30, 2009 10:46

All times are GMT -4. The time now is 03:09.