APPLICATION OF VORONOI TESSELLATION FOR MODELING RANDOMLY PACKED HOLLOW-FIBER BUNDLES

Influence of local voids on flow maldistribution in randomly packed fi ber bundles is examined by Voronoi tessellation. A theoretical express ion for the local void distribution caused by random placement of fibe rs is developed by using a random-cell model. Simulations and packing experiments have been conducted to assess the accuracy of the theoreti cal distribution of cell sizes. In the case of shell side, laminar flo w parallel to the fibers, the theoretical distribution is used to esti mate fRe (friction factor times Reynolds number) and volumetric flows, and to compare results with ordered arrays and experimental data from literature. The results are used to assess the contributions of local voltage variations to flow bypass. This has implications for the pred iction of pressure drop and heat and mass transfer in hollow-fiber mod ule applications where transport is dominated by flow on the shell sid e.