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nash September 6, 2013 12:34

totalPressure boundary :Performance Curve (constant RPM)
 
1 Attachment(s)
Hi everyone,

i'm now working on simulation to generate a performance curve of a radial blower ( to be compared with the curve from manufacturer- see attachment) using simplefoam mrf (OF 2.2.0)

for the first simulation which i want to achieve maximum flow rate ( static pressure difference of inlet and outlet = 0) i used this totalPressure condition for both inlet and outlet (duct):

Code:

  type            totalPressure;
    rho none;
    psi none;
    phi phi;
    gamma 0;
    p0 uniform 0;
    value          uniform 0;

the result seems to be good.


for the next simulation i would like to increase the static pressure difference to 50 pascal. Which one from below initial condition for outlet is the right condition to be made?

0/p for Outlet

Code:

  type            totalPressure;
    rho none;
    psi none;
    phi phi;
    gamma 0;
    p0 uniform 50;

Code:

  type            totalPressure;
    rho none;
    psi none;
    phi phi;
    gamma 0;
    p0 uniform 50;
  value uniform 50;

Code:

  type            totalPressure;
    rho none;
    psi none;
    phi phi;
    gamma 0;
    p0 uniform 50;
  value uniform 0;

or should i use other type of outlet and inlet boundary?

I tend to use totalpressure since i can set the static pressure hence easier for me to obtain the static pressure difference without need to do extra calculation etc.

please correct me if i did wrong.

thank you in advance :)

regards,
nash


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