what's the mean of the "velocity in Stn Frame" ?

August 23, 2007, 04:00

I want to export the velocity values of the grid points. But there are many types, which are "velocity", "velocity in Stn Frame", "velocity u", and so on. What are the differences? Thanks!

jacob.debbarma · May 6, 2012, 21:20

"stn" stand for "stationary", so velocity in stn frame, means velocity wrt a stationary frame of reference. other velocities are wrt to your rotating frame of reference while dealing problems of turbo machinery.

velocity= resultant velocity,V(ui+vj+wk)
velocity u= only x component of V(ui+vj+wk)
velocity stn= velocity wrt stationary frame of reference.

August 23, 2007, 04:00	what's the mean of the "velocity in Stn Frame" ?	#1
jim Guest Posts: n/a	I want to export the velocity values of the grid points. But there are many types, which are "velocity", "velocity in Stn Frame", "velocity u", and so on. What are the differences? Thanks!

May 6, 2012, 21:20		#2
jacob.debbarma New Member jacob debbarma Join Date: Apr 2012 Posts: 4 Rep Power: 14	"stn" stand for "stationary", so velocity in stn frame, means velocity wrt a stationary frame of reference. other velocities are wrt to your rotating frame of reference while dealing problems of turbo machinery. velocity= resultant velocity,V(ui+vj+wk) velocity u= only x component of V(ui+vj+wk) velocity stn= velocity wrt stationary frame of reference. yahya_a, soheil_r7, amirhnp and 4 others like this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Problem with assigned inlet velocity profile as a boundary condition	Ozgur_	FLUENT	5	August 25, 2015 05:58
Boundary conditions for rotating reference frame	Borna	OpenFOAM	1	August 24, 2011 11:25
Question about N-S eqs. in body fixed noninertial reference frame	doctorWho	Main CFD Forum	0	July 12, 2011 19:07
Emergency:UDF for a time dependent parabolic velocity	zumaqiong	Fluent UDF and Scheme Programming	12	March 25, 2010 13:00
what the result is negatif pressure at inlet	chong chee nan	FLUENT	0	December 29, 2001 06:13