摘要
The power-law fluid flow past a row of uniform placed square cylinders is investigated using the Lattice Boltzmann method (LBM).The flow is assumed to be two-dimensional and incompressible.The relaxation time is assumed to be shear-dependent and determined by using a variable parameter related to the local shear rate.The effects of both shear-thinning/shear-thickening property and the cylinder spacing on the confluence of the jets are mainly concerned.The bifurcation diagrams of the flow are obtained,which include confluences of double and quadruple jets.The results show that both the first and second pitchfork bifurcations are advanced due to the effect of the shear-thinning property,and postponed due to the shear-thickening property.
The power-law fluid flow past a row of uniform placed square cylinders is investigated using the Lattice Boltzmann method （LBM）. The flow is assumed to be two-dimensional and incompressible. The relaxation time τ is assumed to be shear-depen- dent and determined by using a variable parameter related to the local shear rate. The effects of both shear-thinning/ shear-thickening property and the cylinder spacing on the confluence of the jets are mainly concerned. The bifurcation diagrams of the flow are obtained, which include confluences of double and quadruple jets. The results show that both the first and second pitchfork bifurcations are advanced due to the effect of the shear-thinning property, and postponed due to the shear-thickening property.
基金
assistance from the Natural Science Foundation of China(GrantNo. 10972115)
