|
[Sponsors] |
March 21, 2013, 02:57 |
blood flow - aneurysm
|
#1 |
Senior Member
stephane sanchi
Join Date: Mar 2009
Posts: 314
Rep Power: 18 |
Hi OF-users,
I'd like to model the blood flow in the aneurysm. Blood characteristics are: - density: 1080 kg/m3 - kinematic viscosity: 3.7037e-06 m2/s Which solver do you recommend for such a computation ? I want to start with a steady-state solver. Best regards, Stephane. |
|
March 21, 2013, 03:23 |
|
#2 |
Senior Member
Anton Kidess
Join Date: May 2009
Location: Germany
Posts: 1,377
Rep Power: 29 |
You specified the viscosity as a constant, thus you can use simpleFoam. In the future, you can easily find the answer to such a question here: http://www.openfoam.com/features/standard-solvers.php
__________________
*On twitter @akidTwit *Spend as much time formulating your questions as you expect people to spend on their answer. |
|
March 21, 2013, 03:30 |
|
#3 |
Senior Member
stephane sanchi
Join Date: Mar 2009
Posts: 314
Rep Power: 18 |
Hi Anton,
OK. But with the simpleFoam solver you don't need the density. Does it mean that density is equal to 1 or not ? You only set the kinematic viscosity. Best regards, Stephane. |
|
March 21, 2013, 03:43 |
|
#4 |
Senior Member
Anton Kidess
Join Date: May 2009
Location: Germany
Posts: 1,377
Rep Power: 29 |
If the density is constant, the equations can be rewritten such as that you do not have to explicitly specify it. Implicitly it comes back in the use of kinematic instead of dynamic viscosity. You can find details in any fluid mechanics textbook.
__________________
*On twitter @akidTwit *Spend as much time formulating your questions as you expect people to spend on their answer. |
|
March 21, 2013, 05:24 |
|
#5 |
Senior Member
stephane sanchi
Join Date: Mar 2009
Posts: 314
Rep Power: 18 |
Hi Anton,
Now it works. I put laminar as RASModel in the RASProperties file. Previously I had kEpsilon as RASModel with turbulence off. So it means that a laminar computation is not equal to a turbulent computation with turbulence off !!! Best regards, Stephane. |
|
March 21, 2013, 05:44 |
|
#6 |
Senior Member
Jose Rey
Join Date: Oct 2012
Posts: 134
Rep Power: 17 |
Blood is non-newtonian also. Does it matter at this scale and conditions?
|
|
March 21, 2013, 06:06 |
|
#7 |
Senior Member
stephane sanchi
Join Date: Mar 2009
Posts: 314
Rep Power: 18 |
Hi,
I think you can assume blood as a Newtonian fluid in (large) arteries. But in small capillaries it must be considered as non-Newtonian fluid. Regards, Stephane. |
|
March 21, 2013, 06:22 |
|
#8 | |
Senior Member
Gerhard Holzinger
Join Date: Feb 2012
Location: Austria
Posts: 339
Rep Power: 28 |
Quote:
This are some lines of simpleFoam.C Code:
Application simpleFoam Description Steady-state solver for incompressible, turbulent flow \*---------------------------------------------------------------------------*/ #include "fvCFD.H" #include "singlePhaseTransportModel.H" #include "RASModel.H" #include "simpleControl.H" #include "IObasicSourceList.H" The file createFields.H of simpleFoam contains the following lines: Code:
singlePhaseTransportModel laminarTransport(U, phi); autoPtr<incompressible::RASModel> turbulence ( incompressible::RASModel::New(U, phi, laminarTransport) ); |
||
March 21, 2013, 06:55 |
|
#9 |
Senior Member
stephane sanchi
Join Date: Mar 2009
Posts: 314
Rep Power: 18 |
Hi Gerhard,thanks for your useful information.
Best regards, Stephane. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Pulsatile blood flow | John H | FLUENT | 7 | March 3, 2022 07:50 |
Modeling blood flow - FloWorks | mcneelyd | FloEFD, FloWorks & FloTHERM | 2 | June 15, 2009 12:53 |
FLUENT BLOOD FLOW RATE | Christoforos | FLUENT | 0 | September 18, 2008 10:08 |
3D pulsatile blood flow UDF | Michal | Main CFD Forum | 0 | February 25, 2005 07:18 |
Fluent blood flow BC | Michal | Main CFD Forum | 3 | February 17, 2005 03:17 |