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Reading BCs from a data set
Posted Nov 23, 2010, 12:06 p.m. EST 1 Reply
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Hello there,
I have this question. I'll try to be clear as much as possible.
-) Suppose you want to insert as inlet boundary condition in a fluid problem a velocity profile that cannot be described by simple functions - for example is a velocity profile from an ultrasound exam.
-) What I have is a table with TIME and VELOCITY
-) What I need is to perform an unsteady simulation and I need the solver to read the table and interpolate the velocity data to get the "correct" velocity for every time in the simulation.
Any idea how to to that in COMSOL 3.5a? I have also COMSOL 4.1 but I'm used to work with 3.5a and I prefer to stick with it for a while.
Cheers
J
I have this question. I'll try to be clear as much as possible.
-) Suppose you want to insert as inlet boundary condition in a fluid problem a velocity profile that cannot be described by simple functions - for example is a velocity profile from an ultrasound exam.
-) What I have is a table with TIME and VELOCITY
-) What I need is to perform an unsteady simulation and I need the solver to read the table and interpolate the velocity data to get the "correct" velocity for every time in the simulation.
Any idea how to to that in COMSOL 3.5a? I have also COMSOL 4.1 but I'm used to work with 3.5a and I prefer to stick with it for a while.
Cheers
J
1 Reply Last Post Nov 23, 2010, 3:48 p.m. EST
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Posted:
1 decade ago
Hiu
my first reaction is to say its the same in 3.5 and 4:
if you a table of t, x, y and v(t,x,y) you can enter this into a Comsol "function from a table", then apply this to the BC and you run a transient solver, COMSOL will normally interpolate it
--
Good luck
Ivar
my first reaction is to say its the same in 3.5 and 4:
if you a table of t, x, y and v(t,x,y) you can enter this into a Comsol "function from a table", then apply this to the BC and you run a transient solver, COMSOL will normally interpolate it
--
Good luck
Ivar