In a food processor, is there any relation between the rpm and the shear force induced on solid pieces or particles? Are there any good resources that tackle the issue of designing a food processor or modeling its behavior? Such as vortex effect, stresses on blade, fluid dynamics and optimal geometry.
Here, we have various parameters include; shear stress which generates the shear force, this force induced the required torque. The rotational speed which is usually fixed and it's a feature of the driving motor, and the required motor output power. Definitely, the velocity (speed) gradient, which is related to rpm, is strongly related to the shear stress which leads to the required power at the end. You should find this topic briefly in fluid mechanics textbooks, but not specifically as stated.
As a first approximation you may treat the problem as a rotational liquid rigid body motion taking a high viscosity value. There is such a mathematical model in Fluid Mechanics textbooks. You may look for such equivalent viscosity to work with (if any).
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