[ofrik]

Hi,
im trying to simulate an air flow throgh a certain pipe, and i need the inlet velocity to varry in time according to the following function:

v=1.384*sin(4pi*t-pi/2)+1.384



i tried to insert an expression to
boundry condition->inlet->velocity magnitude->expression

but im not sure how to write the correct syntax, plus if this is the way to do it.

please help

[hannes]

Dear ofri,

you might have a look at the "uniformFixedValue"-BC ("timeVaryingUniformFixedValue" in older OF versions).
Among other options, it can take a table of values vs. time and interpolates the current value in between.

Regards, Hannes