I would like to calculate the rate at which fluid(oil) is transferred from one chamber to the other. Note the orifices is in the range of 0.0030 to 0.0760 in i'm wondering if the very small size of this hole requires any special consideration. http://myimgs.net/images/oyfi.jpg [Broken] I realize more info such as oil density and dimensions are required for a exact solution, however I would like to determine a general solution into which I can substitute these values. Any hints to get me on the correct path or even better a sample calculation would appreciated. Note this is not a homework question.