Cg_motion udf -- CFD Online Discussion Forums

March 5, 2011, 15:36	Cg_motion udf	#1
Atze Member Join Date: Apr 2010 Location: Pisa / Italy Posts: 62 Rep Power: 16	Hi, I've to analyze a cylinder (2d) constrained with a spring, so the differential equation is S''+w^2 S= F(t) with S= displacement w=sqrt(K/m) and F(t) is the pressure force (time function). How can i solve this problem? The UDF manual describe F=mdv/dt and use Euler's formula, so V(t)=(F/m)Dt+V(t-Dt) how can i write the correct scheme for my problem? Thanks

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 Forum Rules

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Dynamic Mesh UDF	Qureshi	FLUENT	7	March 23, 2017 08:37
UDF parallel error: chip-exec: function not found?????	shankara.2	Fluent UDF and Scheme Programming	1	January 16, 2012 23:14
How to add a UDF to a compiled UDF library	kim	FLUENT	3	October 26, 2011 22:38
UDF...UDF...UDF...UDF	Luc SEMINEL	FLUENT	0	November 25, 2002 05:03
UDF, UDF, UDF, UDF	Luc SEMINEL	Main CFD Forum	0	November 25, 2002 05:01

All times are GMT -4. The time now is 17:10.