An immersed boundary(IB)-lattice Boltzmamm method(LBM)coupled model is utilized to study the particle focusing in a straight microchannel.The LBM is used to solve the incompressible fluid flow over a regular Eulerian ...An immersed boundary(IB)-lattice Boltzmamm method(LBM)coupled model is utilized to study the particle focusing in a straight microchannel.The LBM is used to solve the incompressible fluid flow over a regular Eulerian grid,while the IB method is employed to couple the bead-spring model which represents the fluid-particle interaction.After model validation,the simulations for hydrodynamic focusing of the single and multi particles are performed.The particles can be focused into the equilibrium positions under the pressure gradient and self-rotation induced forces,and the particle radius and Reynolds number are the key parameters influencing the focusing dynamics.This work demonstrates the potential usefulness of the IB-LBM model in studying the particle hydrodynamic focusing.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 91023024the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No 20110092110003the National Science Foundation for Post-doctoral Scientists of China under Grant No 2012M511647。
文摘An immersed boundary(IB)-lattice Boltzmamm method(LBM)coupled model is utilized to study the particle focusing in a straight microchannel.The LBM is used to solve the incompressible fluid flow over a regular Eulerian grid,while the IB method is employed to couple the bead-spring model which represents the fluid-particle interaction.After model validation,the simulations for hydrodynamic focusing of the single and multi particles are performed.The particles can be focused into the equilibrium positions under the pressure gradient and self-rotation induced forces,and the particle radius and Reynolds number are the key parameters influencing the focusing dynamics.This work demonstrates the potential usefulness of the IB-LBM model in studying the particle hydrodynamic focusing.
