CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Transient simulation with initial solution

Register Blogs Community New Posts Updated Threads Search

Like Tree2Likes
  • 2 Post By fluid23

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 25, 2019, 03:36
Default Transient simulation with initial solution
  #1
New Member
 
Join Date: Sep 2012
Posts: 26
Rep Power: 13
tailele is on a distinguished road
Good morning , i need help with a simulation . I must to simulate a freezer with some trays with water inside of these. Now i did a simulation in stationary where i calculate the tubulent model and the corret flow rate from fan , with the drop pressure. In this case i would take the solver solution for another simulation in transient , because i must understand which is the tray that 'll arrive to -20°C with change of fase from liquid to solid. In your opinion is it possible ? and i wonder if are there someone that could tell me how. Thanks for the response
tailele is offline   Reply With Quote

Old   September 27, 2019, 11:05
Default
  #2
Senior Member
 
Matt
Join Date: Aug 2014
Posts: 947
Rep Power: 17
fluid23 is on a distinguished road
Can you rephrase your question. I have no idea what you are asking.
cwl and dmangesh like this.
fluid23 is offline   Reply With Quote

Old   October 2, 2019, 14:44
Default
  #3
New Member
 
Join Date: Sep 2012
Posts: 26
Rep Power: 13
tailele is on a distinguished road
Quote:
Originally Posted by fluid23 View Post
Can you rephrase your question. I have no idea what you are asking.
Sorry….now i ll try do a simulation where i must ice a volume of water. So first I developed the fluid field in a steady state, freeing the energy solver , and
later I changed the physics to implicit unseady. So my question was :
it is possible to fry the viscosity solver, the turbulence solver and the flow solver, and get the right results?

in any case, I am currently developing the simulation in implicit unsteady, without freeing the solver , but I don't understand why the temperature of the water decreases slowly, although it supplies a considerable amount of energy to the air that cools it. i use this physics:
Air:
implicit unsteady
two layer all y+ wall treatment
Exact wall distance
realizable k epsilon two layer
K epsilon turbulance
Reynolds averanged
Turbulent
Segregated fluid temperature
ideal gas
Gradients
Segregated flow
Gas
Three dimensional

Water:
implicit unsteady
Segregated multifase temperature
Two layer all y+ wall treatment
Exact wall distance
realizable k epsilon two layer
K epsilon turbulance
Reynolds averanged
Turbulent
Gradients
Segregated flow
Multiphase equation of state
VOF
multiphase interaction
Eulerian multphase
Three dimensional

In your opinion there is some error?
tailele is offline   Reply With Quote

Reply


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem with chtMultiregionFoam radiation boundary condition baran_foam OpenFOAM Running, Solving & CFD 10 December 17, 2019 17:36
Wrong fluctuation of pressure in transient simulation caitao OpenFOAM Running, Solving & CFD 2 March 5, 2015 21:33
Compressor Simulation using rhoPimpleDyMFoam Jetfire OpenFOAM Running, Solving & CFD 107 December 9, 2014 13:38
Orifice Plate with a fully developed flow - Problems with convergence jonmec OpenFOAM Running, Solving & CFD 3 July 28, 2011 05:24
Error while running rhoPisoFoam.. nileshjrane OpenFOAM Running, Solving & CFD 8 August 26, 2010 12:50


All times are GMT -4. The time now is 16:24.