CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Some problems in Fluent,Turbulence Viscosity Ratio/ads-0/Face handedness/floating poi

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 15, 2015, 13:53
Default Some problems in Fluent,Turbulence Viscosity Ratio/ads-0/Face handedness/floating poi
  #1
Member
 
Onur
Join Date: Sep 2015
Posts: 42
Rep Power: 2
Onurozcan is on a distinguished road
Hi,

I am working on simulation of 3D heat exchanger,recuperator, and analysis of flow,turbulence etc.Both internal and external are available.

I have check mesh and the results:

Min skewness :2.699e-4
Max skewness: 0.9688

Min orthogonal quality:0.100481
Max. orthogonal quality : 0.99966 ( I have press control and would like to change max. orthogonal quality as 0.1 is but can't enable me to change it)

in boundary conditions of external flow I have changed turbulence viscosity and ratio %1

Maximum aspect ratio : 4.16e+1

Turbulence solver: K-epsilon and energy equation
Solver:Pressure based and steady state
Pressure-Velocity-Coupling : Coupled
Gradient: Green Gauss Node Based
Pressure :Standart
Momentum-Turbulent-Energy: First Order Upwind
Solution Methods: High order term relaxation : 0.1 all variables
Solution Control : Courant Number :30 and in URF turbulence kinetic energy/viscosity/dissipation rate :0.1

in boundary conditions of external flow I have changed turbulence viscosity and ratio %1
in boundary conditions of internal flow I have changed turbulence viscosity %1 and ratio 10



When I have initiated ''Hybrid Initialization, has been shown photos below.

https://imageshack.com/i/paPEEpJup
https://imageshack.com/i/p5A9witGp
https://imageshack.com/i/p3spc5GOp


I would be happy If anoyne can help me.
Onurozcan is offline   Reply With Quote

Reply

Thread Tools
Display Modes

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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Polyflow : Fibre drawing, Problems when viscosity recheaches high values (about 1e14) michael.jeunehomme@gmail. ANSYS 0 August 13, 2015 06:13
Problem with divergence TDK FLUENT 10 September 8, 2012 01:11
[ICEM] Problems with coedge curves and surfaces tommymoose ANSYS Meshing & Geometry 0 August 5, 2011 16:02
Problems with changing turbulent viscosity by UDF sarah_ron FLUENT 0 February 14, 2005 01:31


All times are GMT -4. The time now is 04:47.