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This work establishes the link between direct measurement of powder flow in a horizontal mixer and shaft torque. Three agitator designs were used: one featured six long flat blades, one a long flat blade and the third, four series of short paddles. With the single long flat blade agitator, the amount of powder moved by the blade was related to the torque. The relationship between torque and nondimensional mean tangential velocity was demonstrated using phase diagrams. These remained unchangeddoi:10.14356/kona.2001016 fatcat:5yrma4cudjc5pcufe4pvb6isxe