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How to simulating the free-fall phenomenon of a 3D model?
Posted 13.08.2010, 00:04 GMT-4 1 Reply
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Hi pros,
I am interested in using COMSOL Multiphysics for simulating various phenomenons in real-world. I see that this software is very strong software for simulating heat, electric,...but for mechanics, it is so few of use.
in fact that, i want to simulate a body free fall into other body under but i don't know how to do in COMSOL GUI, how to add physics, how to apply gravity accelerater? how?
Any tutorials are considers,
AnhNT,
I am interested in using COMSOL Multiphysics for simulating various phenomenons in real-world. I see that this software is very strong software for simulating heat, electric,...but for mechanics, it is so few of use.
in fact that, i want to simulate a body free fall into other body under but i don't know how to do in COMSOL GUI, how to add physics, how to apply gravity accelerater? how?
Any tutorials are considers,
AnhNT,
1 Reply Last Post 13.08.2010, 02:56 GMT-4
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Posted:
1 decade ago
Hi
COMSOL is not really set up as a rigid body analysis programme, but still you can do quite a lot with it.
There are other tools such as MapleSim or Modelica that are more oriented in this direction
In COMSOL. for the gravity force, it's called (as in standard physics) a "body force" or "body load" and is expressed as [N/m^3] that is each "dm=rho*dV" sees a force, expressed as the gravity acceleration times the density.
In 3.5 this is typically "G*rho_smsld" where G is a constant defined as 1[lbf/lb] or just 9.81[m/s^2]
in 4.0 tis is defined as "g_const*solid.rho" where g_const is the internal value of the gravity acceleration
You still need to orient the gravity vector as you want with the correct sign
--
Good luck
Iva
COMSOL is not really set up as a rigid body analysis programme, but still you can do quite a lot with it.
There are other tools such as MapleSim or Modelica that are more oriented in this direction
In COMSOL. for the gravity force, it's called (as in standard physics) a "body force" or "body load" and is expressed as [N/m^3] that is each "dm=rho*dV" sees a force, expressed as the gravity acceleration times the density.
In 3.5 this is typically "G*rho_smsld" where G is a constant defined as 1[lbf/lb] or just 9.81[m/s^2]
in 4.0 tis is defined as "g_const*solid.rho" where g_const is the internal value of the gravity acceleration
You still need to orient the gravity vector as you want with the correct sign
--
Good luck
Iva