And if you've been to AB facility in St. Louis, you will see that their whirlpool tanks have their inlets at all sorts of heights and even "backwards" from the clockwise rotation that coriolis would suggest. They've tried many configurations with little improvement in results. Agree with Justus4all, coriolis is not a factor. Some other factors include those important to Stoke's Law: viscosity and difference in specific gravity between the wort and the trub. I've had problems with worts using oats before. Might be viscosity? A slight dish or slight cone on the bottom would also help place trub correctly.
Phillip Kelm--Palau Brewing Company Manager--
Worldwide Brewery Installations