Hi
Is it RigidBodyMotion.pdf document available in the website?
----- Original Message ----
From: Bill Henshaw <henshaw@xxxxxxxx>
To: overture@xxxxxxxxxxxxx
Sent: Wed, April 7, 2010 5:39:55 AM
Subject: [overture] Re: rigid body motion
Hi Joel,
Joel Guerrero wrote:
Hi Bill,
Two questions. I was checking the function where the forces are computed (in
InsParameter.C), and I wonder why do you multiply the pressure by the fluid
density (see getNormalForce)?
The "pressure" in the incompressible solver is really p/rho so I multiply by
rho to get the true (dynamic) pressure.
Between the euler and leapfrog method in RigodBodyMotion, which one gives
better results?
The usual scheme is a leapfrog predictor and a trapezoidal corrector as
discussed in the RigidBodyMotion.pdf
document and in one of our papers.
Regards,
Bill
regards,
Joel
----- Original Message ----
From: Bill Henshaw <henshaw@xxxxxxxx>
To: overture@xxxxxxxxxxxxx
Sent: Thu, April 1, 2010 8:47:29 PM
Subject: [overture] Re: rigid body motion
Yes!
Joel Guerrero wrote:
Hi Bill,
The forces used in RigidBodyMotion.C are the forces computed in MovingGrids.C?
Joel
----- Original Message ----
From: Bill Henshaw <henshaw@xxxxxxxx>
To: overture@xxxxxxxxxxxxx
Sent: Thu, April 1, 2010 5:52:36 AM
Subject: [overture] Re: rigid body motion
Joel,
It seems that you just need to change the Newton-Euler quations
RigidBodyMotion.C
in functions integrate and correct.
Regards,
Bill
Joel Guerrero wrote:
Hi,
Specifically I want to to model a spring-damper-mass system, where the forces
(let say the vertical force) is calculated as follow: m*a+k*v+c*y=fy plus an
additional derivate in the RHS. Currently and if I am not mistaken, the forces
are computed as fy = m*a, hence, I want to modify the way fy is computed by
adding the additional terms.
Regards,
Joel
----- Original Message ----
From: Bill Henshaw <henshaw@xxxxxxxx>
To: overture@xxxxxxxxxxxxx
Sent: Wed, March 31, 2010 12:42:50 AM
Subject: [overture] Re: rigid body motion
Hi Joel,
I wonder if you can be more specific on what exactly you want to do?
Regards,
Bill
Joel Guerrero wrote:
Hi,
I have to modify the way forces are computed for rigid body motion, I wonder
which files should I modify (rigidbodymotion or movinggrids)? What I need is
to add three more derivatives to the way that forces are compute. Any
suggestion will be appreciated.
Cheers,
joel
