TURBULENCE STUDY OF THE INFLUENCE OF MATERIAL PARAMETERS UPON THE PULP FIBRE SUSPENSIONS

In this paper, the material parameters of fibresuspensions (kind and dimension of the fibre) show an importantinfluence upon turbulence. According to a simulation by the Phoenicssoftware, we can draw the following conclusions:the velocity gradients increase with the concentration for thesame kind of pulp suspension, and at the same time, the shear stress andthe difference of the radial concentrations increase; for the different kind ofpulp suspension, the shear stress of the wood pulp suspension is higherthan that of the straw pulp suspension in the same concentration; theconcentration of the pulp suspension is higher in the center, and lower at the wall surface, decreasing monotonously;the difference of the radial concentrations of the straw pulp suspensionis smaller than that of the wood pulp suspension.