I am trying to calculate the necessary diameter (or cross sectional area) of a pipe to yeild a known flow rate for dispensing grain. Could anyone give me any pointers?
Can any body give me any pointers;
I'm trying to find the heat tranfer of a metal cube (150x150x150) at 90 deg c through a layer of stationary air to the surface of a plastic tube 200mm away from the cube's surface. It is as if the cube is in the centre of a platsic tube and surrounded by air...