# 3D Ejector Thrust Calculation

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 LinkBack Thread Tools Search this Thread Display Modes
 April 6, 2007, 14:59 3D Ejector Thrust Calculation #1 Emmanuel Guest   Posts: n/a In the 3D model of an axisymmetric nozzle and ejector combination I computed before, I modeled just one quarter (taking advantage of the symmetry) of the whole model. Using surface integral I obtained the expected velocity at the ejector outlet, the area of this surface is one quarter the actual area as expected. My problem is the thrust of the ejector. The axisymmetric model gave me a value about 4N using Report-->Forces option, this was close to my expected result. For the 3D model I was expecting about 1N (which is a quarter because of the area is a quarter) for the thrust, but the obtained about 0.08N which is much smaller. I have checked my units and scale and do not know what could be wrong. The thrust on any wall surface can be simply calculated from the total force acting on the wall boundary (ejector wall) through Report-->Forces option. In the Force report panel, you can specify the Force vectors and select the ejector wall under Wall Zones option. When you click on the Print option, the total force acting on the desired wall surface will be printed on the FLUENT console window.

 Thread Tools Search this Thread Search this Thread: Advanced Search Display Modes Linear Mode

 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 OffTrackbacks are Off Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post mannobot Main CFD Forum 3 December 7, 2018 10:37 Susan YU FLUENT 0 June 2, 2010 09:46 mannobot FLUENT 1 June 2, 2010 05:20 AB Siemens 6 November 15, 2004 05:41 Alberto Schroth FLUENT 0 May 16, 2000 09:19

All times are GMT -4. The time now is 12:28.

 Contact Us - CFD Online - Privacy Statement - Top