discontinuous second derivative -- CFD Online Discussion Forums

April 27, 2012, 22:24	discontinuous second derivative	#1
new_at_this Member Peter Join Date: Oct 2011 Posts: 52 Rep Power: 14	I am calculating the first and second derivative of a velocity profile. I am using a 3 point centered for the 1st derivative and 5 point central stencil for the 2nd derivative. For some reason I am getting a discontinuous 2nd derivative but I have a smooth 1st derivative. Could some one explain what is going on?

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
Derivative matrix	jollage	Main CFD Forum	0	September 21, 2011 18:16
can i get pressure derivative in UDF?	ruirui389	Fluent UDF and Scheme Programming	4	April 8, 2011 04:12
scalar and its derivative	sucker	Main CFD Forum	1	April 15, 2008 13:28
Obtaining substantial or partial derivative of vel	KRK	FLUENT	0	January 10, 2007 12:35
Second derivative with cfx 5.7.1	Alessandro	CFX	10	April 21, 2006 10:31

All times are GMT -4. The time now is 17:12.