|August 14, 2013, 12:05||
Defining TOP HAT VELOCITY profile
Join Date: Apr 2012
Posts: 10Rep Power: 6
I want to define a top hat velocity profile at my inlet. I dont know the code to define top hat velocity profile. does any body know it. Please answer.
|January 14, 2014, 05:58||
Velocity inlet UDF in fluent
Join Date: Sep 2013
Posts: 11Rep Power: 4
I want to use a user defined function for velocity inlet for following conditions:
v_x = (2/3)*z for z = 0 to 30
v_x = 20 for z = 30 to 70
v_x = (200/3)-(2/3)*z for z = 70 to 100
It is for 3D compressor cascade inlet. I do not know how to write such functions.
Can anyone help me?
|July 9, 2014, 13:01||
Join Date: Jan 2013
Posts: 101Rep Power: 5
I have a 2D axisymmetric geometry where I want to impose a non uniform velocity field in the fluid region (not a boundary, but the internal field). I have the coordinates and the axial and radial velocity components from a previous simulation.
How do I go about importing this into the current case. Also is there a better way to store the velocity value other than File -> Export?
Thanks in advance
|January 12, 2016, 11:03||
Periodic BC DDPM, UDF
Join Date: Jun 2013
Posts: 64Rep Power: 5
I am using, DDPM simulation using ANSYS 14.5, for a simple system. I used inlet as periodic and outlet as shadow in ANSYS for making it periodic but after making periodic I have no control on the inlet (I am unable to specify mass flow rate inlet), it is showing option to specify pressure gradient.
Thanks for helping in advance!!!
|April 25, 2016, 18:41||
UDF for inlet y velocity 2D
Join Date: Dec 2015
Location: San Diego, CA
Posts: 3Rep Power: 2
I have seen and used UDFs for the inlet x velocity, but what do I do to make a UDF for inlet y velocity.
Here is the UDF that I used for inlet x velocity.
#define umean 10.0
#define R 0.0005
y = x;
F_PROFILE(f,t,i) = (3./2.)*umean*(1-pow((y-R)/R,2));
I tried replacing x with y and vice versa to hopefully get the y-direction velocity, but unsuccessful.
Any suggestions here will be useful.
|April 26, 2016, 04:58||
Join Date: May 2014
Posts: 224Rep Power: 5
y = x;
If you want a velocity profile normal to the Y direction, you need to use the variation of the position in the X direction if 2D and X and/or Z direction if 3D.
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