Entry ow computations of shear-thinning and viscoelastic liquids with the LS-STAG immersed boundary method

摘要：

　　This communication presents computations of 2D complex uid ows performed with a well established Immersed Boundary (IB)/ cut-cell method,the LS-STAG method (Cheny & Botella,Journal of Computational Physics 2010).The term complex uid refers here to a material which has a viscoelastic or non-Newtonian behaviour,or both.One of the distinguished features of our IB method is to use level-set (LS) techniques in the cut-cells near the irregular boundary,where accurate discretization is of paramount importance for stability and accuracy of the computations.For this purpose,we have achieved an unied framework for the computation of the Navier-Stokes equations,viscoelastic constitutive law and non-Newtonian viscosity on the LS-STAG mesh.The robustness and the validity of our numerical predictions will be evaluated for planar contraction ow of a shear-thinning and viscoelastic uid for which experimental and computational results are available.

关键词： Immersed boundary method cut-cell method Incompressible flows non-Newtonian fluids viscoelastic fluids planar contraction flows

作者: Olivier Botella Farhad Nikfarjam Marcela Stoica Yoann Cheny

作者单位: LEMTA, Université de Lorraine, CNRS

会议类型: 国际会议

会议名称: The 8th International Conference of Computational Fluid Dynamics, (ICCFD8)(第八届国际计算流体力学会议)

会议地点: 成都

会议语种:英文

页码: 1-9

在线出版日期: 2014-07-25（万方平台首次上网日期，不代表论文的发表时间）