I'm currently struggling slightly with finding some information regarding a vortex. If I have a fluid in a cylindrical container and the fluid is then rotated at a constant speed, the vortex will displace the water and raise it relative to the initial level of the fluid. Is there any formula describing this change in height taking into consideration the viscosity of the fluid? I've been digging for some time now and cannot find anything on this, I'd really appreciate some help. Thanks in advance!