# oscillating flow

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

 February 21, 2006, 05:02 oscillating flow #1 bb Guest   Posts: n/a hello! I would like to simulate oscillating flow through a nozzle, and the frequency is very high (approximately 1000-2000Hz). I dont have any experience with that kind of simulations so I would like to know what is the best approach. For instance how do I define velocity inlet with oscillating flow? thanx for, I am sure I will have further questions! BB

 February 21, 2006, 05:33 Re: oscillating flow #2 mAx Guest   Posts: n/a hi, you have to describe you velocity inlet with a UDF, just like this example (UDF MANUAL) /************************************************** ******************** unsteady.c UDF for specifying a transient velocity profile boundary condition ************************************************** *********************/ #include "udf.h" DEFINE_PROFILE(unsteady_velocity, thread, position) { face_t f; real t = CURRENT_TIME; begin_f_loop(f, thread) { F_PROFILE(f, thread, position) = 20. + 5.0*sin(10.*t); } end_f_loop(f, thread) }

 February 22, 2006, 02:24 Re: oscillating flow #3 Kharicha Guest   Posts: n/a With so high frequency, it is better to use a turbulence model...set the mean velocity, and through the amplitude of oscillations you can fix the turbulence intensity....

 Thread Tools 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 On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post pxyz Main CFD Forum 37 July 7, 2006 08:42 BV Main CFD Forum 0 February 24, 2006 13:57 diaw Main CFD Forum 104 February 16, 2006 06:44 Glenn FLUENT 0 July 11, 2002 10:33 Denis Tschumperle FLUENT 7 August 9, 2000 02:19

All times are GMT -4. The time now is 06:46.