Calculating Viscosity from power draw on a motor??
Calculating Viscosity from power draw on a motor??
(OP)
I am trying to equate power draw on a mixing motor to vicosity of solution?? Ihave been ready up on it, but am having a hard time finding a practical set of equations to do so....
As usual thanks in advanc efor the help...
As usual thanks in advanc efor the help...





RE: Calculating Viscosity from power draw on a motor??
You may be able to come up with a number, but I doubt it would be very accurate. Type of mixer, vessel shape, impeller speed will all have an effect.
Probably the most accurate way would be to test with two or three products of a know viscosity and interpolate a aproximation from there.
It will also depend on whether the product is Newtonian, Thixotropic, or Dilatent (if they get thinner, thicker or stay the same due to the mixing affect)
If you are using the same product, and just working on something as simple as adding water to a mix until it reaches a set-point you may have some success.
RE: Calculating Viscosity from power draw on a motor??
I never tried to back out viscosity. Too complex. I'd think it'd be better to correlate the power draw with lab data and see how good the correlation is.
Good luck,
Latexman
RE: Calculating Viscosity from power draw on a motor??
RE: Calculating Viscosity from power draw on a motor??
I am working a researcher who is formulating a collogen based gel and would like to get a speed/temp/time profile for each given formulation. The motor/vessel are the only constants right now. That is why I was thinking about trying to calculate something based on the fact that we have alot of unknowns. If I can get the temperature range set, then whole thing become a heck of alot easier
Thanks for the responses...Don't you just love research efforts!!! Great challenges....