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

Fluent newbie in need of help w/unsteady flow

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 7, 2011, 02:59
Exclamation Fluent newbie in need of help w/unsteady flow
  #1
New Member
 
Danny
Join Date: Dec 2011
Posts: 2
Rep Power: 0
Cheese_man is on a distinguished road
Hello Everyone,

For the last 2 weeks I have tried to model an unsteady flow with no viable results.

Problem description:

Create a 10 meter in diameter cylindrical tank with an outlet nozzle of 1 meter in diameter. How long does it take the fluid level to drop from 30meter above the tank outlet to 1 meter above the tank outlet?

The top of the tank is open to the atmosphere.

I have done the following:

- Created geometry in GAMBIT. (30m height, 10m diameter, w/nozzle 1m above bottom)

- Once in FLUENT:

Define/Models/Solver/Unsteady
Define/Models/Viscous/k-epsilon
Define/Operating Conditions/

-Pressure set at 101325 Pa
- Gravity check marked

Define/Boundary Conditions/

- Open top of cylinder: Vent Inlet @ 0 psig
- Nozzle exit: 1 flow rate

Solve/Monitors/Residuals

-All checked marked (1x10^-5)

Solve/Monitors/Statistics

-Time and delta time: print

Solve/Initialize/Initialize

- No initial conditions since at time zero draining has not begun.

Solve/Iterate

- NOT SURE WHAT TO DO HERE!

PLEASE HELP!!! I am worn out from trying everything possible! (except the right approach)
Cheese_man is offline   Reply With Quote

Reply

Tags
tank drain, unsteady flow

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
reversed flow in unsteady simulation with dynamic mesh (fluent 12.1) zhaoyu_001 FLUENT 0 April 7, 2010 00:24
swirling flow in simpleFoam compared with FLUENT belinda OpenFOAM Running, Solving & CFD 0 November 2, 2009 04:57
Fluent Cp more than 1 for incompressible flow rif Main CFD Forum 2 September 29, 2008 05:25
How to model suction flow in an airfoil in Fluent Davy FLUENT 4 October 23, 2006 03:56
Inviscid Drag at subsonic, subcritical Mach # Axel Rohde Main CFD Forum 1 November 19, 2001 13:19


All times are GMT -4. The time now is 04:46.