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

External forces on Stokes flow

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 16, 2021, 14:27
Default External forces on Stokes flow
  #1
New Member
 
Leonardo Soto
Join Date: Jan 2021
Posts: 1
Rep Power: 0
est120 is on a distinguished road
Analyzing low Re number flow, Navier Stokes equations take a special form
i can't understand why books always "neglect" gravity, i can think of gravity as some body force per unit mass but if it doesn't appear annymore then what force canceled it?
https://ibb.co/VHMpHLs
est120 is offline   Reply With Quote

Old   January 16, 2021, 14:48
Default
  #2
Senior Member
 
Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,882
Rep Power: 73
FMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura aboutFMDenaro has a spectacular aura about
Quote:
Originally Posted by est120 View Post
Analyzing low Re number flow, Navier Stokes equations take a special form
i can't understand why books always "neglect" gravity, i can think of gravity as some body force per unit mass but if it doesn't appear annymore then what force canceled it?
https://ibb.co/VHMpHLs

Gravity is often disregarded also for finite values of Re. It becomes relevant for buoyancy related problems
FMDenaro is offline   Reply With Quote

Reply

Tags
stokes flow


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
About Some Concepts:Laminar flow, turbulent flow, steady flow and time-dependent flow Jing Main CFD Forum 8 October 5, 2018 18:02
Simulating a forced external flow loop with 2 phases CeesH FLUENT 1 August 27, 2018 08:31
Review: Reversed flow CRT FLUENT 1 May 7, 2018 06:36
forces on body in oscillatory flow ashkan OpenFOAM Running, Solving & CFD 1 April 13, 2018 08:15
difrrence betwin external and internal flow hmasenger CFX 1 January 1, 2013 18:51


All times are GMT -4. The time now is 15:17.