# Stratified environment

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

 July 19, 2012, 00:44 Stratified environment #1 Member   HMR Join Date: Jan 2011 Posts: 32 Rep Power: 8 Hi CFX Users, I am simulating a case into a small rectangular box(length=width=1m, height=0.3m) open top, wall non-slip rigid insulated and bottom also insulated except the small nozle(r=0.005m) for injecting single phase water jet flow inside it. Newtonian stratified single phase fluid is considered in this box. From calculation, I put water jet velocity0.0343m/s and its temperature 298.64K. As stratified fluid stay in the box so every meter of height of the box temperature will chage N=8.155 K/m so i write an expression To=302.44-N* Z coordinate, and initializes it . Choose bouyancy and its temperature 300K from setup as this is a negative bouyancy case. mesh sizes 3mm, time step 0.087 with 1.8million of mesh, I run this simulation for 400sec. Everything fine , simulation finished well but the problem is jet flow penetration height inside this box is not long enough what we expected from previous investigations done by another people in fluent. I do not understand what is happening. I tried in different way but no solutions i get till now. If anybody give me any suggestion it will be a great help for me.Because around me knowbody actually know CFX. Regards HMR

 July 19, 2012, 06:08 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,805 Rep Power: 107 Can you confirm that your temperature function just defines the intial condition? Obvious from there the air establishes its own temperature field in the simulation. Have a look at this FAQ: http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F

 July 21, 2012, 21:07 #3 Member   HMR Join Date: Jan 2011 Posts: 32 Rep Power: 8 Hi Glenn, Thanks for your reply. Yes I am trying to figure out the problem according to your advice. Cheers HMR

 July 23, 2012, 09:44 #4 Member     Felipe Gobbi Join Date: Apr 2012 Location: Brazil Posts: 76 Rep Power: 7 Attach some pictures of your results so ppl here can analyse.

 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 Modest Cat Fluent UDF and Scheme Programming 39 May 18, 2016 10:33 Mohan CFX 20 March 30, 2011 18:56 toyoto Main CFD Forum 0 September 2, 2009 23:10 toyoto FLUENT 0 September 2, 2009 23:05 Latifimran Jalil Main CFD Forum 0 September 12, 2002 18:42

All times are GMT -4. The time now is 14:45.

 Contact Us - CFD Online - Privacy Statement - Top