How a propeller blade is resisted by various viscosity?
I'm building propeller blades to blend various solutions.
But I'm stuck: is there a formula to determine the resistance a specific viscosity will provide against a surface area?
Meaning, if the liquid has a visocosity of water, or very near to it, the force required to "mix" it will be differant that something that has a viscosity of, oh, say, suntan lotion.
Of course the blade profile will affect the resistance, but, if the blade profile is static, how do I figure out how much power is needed to turn the propeller at a specific rpm for each viscosity?
I'm pretty much at a loss on this one....