Combined rheometer/mixer having helical blades and methods of determining rheological properties of fluids

摘要

A method of determining rheological properties can include dispensing a fluid into a rheometer including a stator having at least one helical blade, measuring torque (T) due to relative rotation between the stator and a rotor of the rheometer at different rotational speeds (RPM"s), calculating shear stress (SS) as follows: SS = TPK, and calculating volume averaged shear rate (VASR) as follows: VASR = kl*RPM , where K, kl, a and b are experimentally- derived coefficients. A method of mixing fluids and performing a rheological test on the admixed fluids can include dispensing a fluid into a rheometer, then dispensing another fluid into the rheometer, then mixing the fluids with at least one helical blade of the rheometer, and then measuring torque due to relative rotation between a stator and a rotor of the rheometer. A rotary rheometer can include a rotor, and a stator having at least one helical blade.