Load on surface - function

[timetojack]

Hi, I would like to make pressure load on surface with COS()function.

Pressure value is 8kN/m2 and I want this value change with COS(angle).

This is how it should looks:

http://img194.imageshack.us/img194/5130/beznazwy2dfg.jpg

Any help?

 

[timetojack]

It also can be !y/3 function (3 is radius of my silo). Values of pressure will be from 0 (0/3) to 1 (3/3).

 

[timetojack]

Sorry for a mess

I did it. Load on surface -> Pressure -> Method variable -> Advanced -> Equation (!y/3) -> OK
Then, Load -> Expand...