# Fluent + flow past cylinder at Re=40

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

 April 12, 2013, 04:49 #21 New Member   Mitesh Vegad Join Date: Apr 2013 Posts: 18 Rep Power: 6 I am extending study of flow over circular cylinder for Re=40, considering heat transfer along with fluid flow. I am solving non dimensional form of steady, 2-D energy equation with constant fluid property and no heat generation, along with the mass and momentum conservation in 2-D The boundary condition that i have specified is: Cylinder: Wall at constant temperature at value of 1.0 Inlet: Constant velocity at constant temperature at value of 0.0 exit: outlet Top and bottom horizontal surface: wall, adiabatic I have not switched on the gravity.... (am no considering natural convection) The trouble is that when i run the simulation .... it gives a message: Value of temperature limited to 1.0 in the fluid zone!!! The residual curve for energy equation is flat! Can someone help what this is??

 April 13, 2013, 05:50 #22 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,358 Blog Entries: 6 Rep Power: 45 Do you have some particular experimental setup in your mind? How do you specify boundary conditions and what parameters you are trying to match?

 April 14, 2013, 16:12 #23 New Member   Mitesh Vegad Join Date: Apr 2013 Posts: 18 Rep Power: 6 I am actually trying to ultimately solve flow of fluid around a heated cylinder... The problem is that when i try and simulate for non dimensional equations using Fluent for the following parameters: Pr=5.6, Re=10, Gr=0 there is problem when i initialize the solution...the message that i get is... Temperature limited to 1.0 in fluid zone!!! However when i use the DIMENSIONAL values of density, viscosity, specific heat and thermal conductivity along with the diameter value and input velocity (for Re=10) then i get the solution!! Can you help and tell where the problem is???

 April 18, 2013, 06:42 #24 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,358 Blog Entries: 6 Rep Power: 45 any update?

 April 21, 2013, 23:38 #25 New Member   Mitesh Vegad Join Date: Apr 2013 Posts: 18 Rep Power: 6 Actually when i am solving for NON DIMENSIONAL form of governing equation.... the way i have defined non dim temperature... the value is ZERO at the inlet.... Fluent has something that they call as FLOOR and CEILING values set for the parameter... its there in SOLVE menu.... One has to set the FLOOR value to zero.... (DEFAULT is one)... then things work out.

 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 rshbhb FLUENT 53 November 5, 2014 20:07 [ICEM] Flow past a 2D cylinder arun7328 ANSYS Meshing & Geometry 0 February 15, 2013 13:17 goodegg Main CFD Forum 12 January 22, 2013 12:47 pedroxramos FLUENT 0 January 14, 2013 13:39 joe FLUENT 6 August 11, 2007 09:02

All times are GMT -4. The time now is 08:47.

 Contact Us - CFD Online - Privacy Statement - Top