CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > CFX

RPM (+/-) thumb rule

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

LinkBack Thread Tools Search this Thread Display Modes
Old   November 5, 2007, 23:36
Default RPM (+/-) thumb rule
Posts: n/a
hello guys!

While defining angular velocity to any mesh,what is the thumb rule?

Suppose im looking from the negative z and i want the geometry to revolve around z,say in negative y direction(as can be seen in gui),then while defining rpm,it will be positive or negative?

help required.thanks.
  Reply With Quote

Old   November 6, 2007, 05:19
Default Re: RPM (+/-) thumb rule
Glenn Horrocks
Posts: n/a

The thumb rule is if you want the rotation to be in the direction your fingers point then your thumb points in the vector which represents that rotation. In a right hand coordinate system (CFX and most of the world uses a right hand coordinate system) you use your right hand for this.

This is high school level mathematics. I hope this is not new to you - if it is then I fear CFD will be beyond you for a little while yet.

Glenn Horrocks
  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
Extend Project 1.6-ext Binary Release for Mac OS X hjasak OpenFOAM Announcements from Other Sources 26 November 5, 2013 16:50
OpenFoam 1.6-ext - RPM build errors preibie OpenFOAM 12 September 8, 2011 03:12
Rule of Thumb to Estimate Total Cells chinc Main CFD Forum 0 April 12, 2011 21:52
gcc and executable file from Mac to Linux simone Marras Main CFD Forum 0 April 8, 2007 15:49
is there any thumb rule for mesh size Ram Dayal Main CFD Forum 19 October 17, 2006 14:07

All times are GMT -4. The time now is 06:04.