Viscosity machine, Luwa high

Design of The Luwa High-Viscosity Machine (Luwa-FUmtruder)... 

To characterize heat transfer of solvent stripping processes in the Luwa high-viscosity machine, two different heat transfer coefficients have been defined ... 

Figure 10. Industrial size high viscosity machine (Luwa Film-truder) (heating area=12 square meters)...

Figure 13 Course taken by shear gradient S, concentration X, viscosity n, and product temperature T along the length of the processing ana discharge zone of a high viscosity machine (Luwa Filmtruder)...

Fig. 36. Schematic layout of high-viscosity machine (Luwa Filmtuder) with discharge mechanism. (Reprinted with permission from Widmer, F Polyemrization Kinetics Technology 51, Advances in Chemistry Series 128, Copyright 1973, American Chemical Society.)...

A specially designed thin-film machine can be used to process very viscous, non-Newtonian materials. The apparatus can also be used to remove solvents from polymers and polycondensation processes having viscosities exceeding 10,000 poises. The Luwa thin-film machine has a small clearance between the heated wall and rotor blade. This clearance results in high shear gradients and considerably reduces apparent viscosity. The increased turbulence and improved surface renewal that ensue improve reaction velocities and aid the required forced product flow on the walls of the apparatus. 

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