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UBC Mechanical Engineering CFD Modeling Group

MODEL. OBJECTIVES. Modified k - model for highly curved turbulent flows Finite volume discretization using a generalized curvilinear system Particle tracking through explicit time marching based on force balance. Compute 3D flow in hydro-cyclones

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UBC Mechanical Engineering CFD Modeling Group

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  1. MODEL OBJECTIVES • Modified k- model for highly curved turbulent flows • Finite volume discretization using a generalized curvilinear system • Particle tracking through explicit time marching based on force balance • Compute 3D flow in hydro-cyclones • Improve mathematical models of swirling flows • Develop mathematical models to compute fiber trajectories in complex flows • Model separation and fractionation according to fiber properties in hydro-cyclones TECHNOLOGY TRANSFER License agreement PSL Service agreements Custom agreements Consulting agreements License agreements Government Industry Other Institutions Influence of the particle length on fractionation (a) Velocity vectors, (b) pressure contours, and (c) swirl velocity contours in a hydrocyclone Influence of the particle density on fractionation The difference between particles carried over at t = 20°C and t = 45°C. The yellow grid represents particles carried over at t = 20°C UBC Mechanical Engineering CFD Modeling Group FLUID - FIBER INTERACTION IN HYDRO-CYCLONES Influence of the particle diameter on fractionation Zhengbing Bian Paul Nowak Eric Bibeau Mohammad Shariati Suqin Dong Emil Statie Xioasi Feng David Stropky Mike Georgallis Zhu Zhi Xiao Pingfan He Jerry Yuan Lu Hua Kegang Zhang Dr. Martha Salcudean Weyerhaeuser Industrial Research Chair Fellow C.S.M.E., F.C.A.A., F.R.S.C. Dr. Ian Gartshore Fellow C.A.S.I. BENEFITS • Increase operating efficiency for hydro-cyclones • Optimize the hydro-cyclones design • Evaluate the influence on fractionation of fiber wet density, fiber diameter, fiber length, and fiber specific surface • Evaluate the influence of the fluid temperature on fractionation • Predict the fractionation performance of a hydro-cyclone for given fiber properties FUNDING - FRBC - Network for Mechanical Pulping - Weyerhaeuser Paper Company Separation on diameter and length as function of the particle density END-USERS • Pulp mills requiring high efficiency for fiber cleaning and fractionation • Hydro-cyclone manufacturers

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