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Development of a Model for Polymeric Liquids
Shear Flow Between Parallel Plates
Rectilinear Elongational Flow
3 other sections not shown
aluminum soap solution assume behavior birefringence Cartesian coordinate system components configuration constant model 3.12 constitutive theory constraint data by Huppler deformation tensor described in Table determine dynamic viscosity Elastic Fluids elastic solid elastic stress elongation rate elongational flow elongational viscosity evolution equation extra-stress Flow Birefringence four constant model free energy free energy function given by Huppler given in Table incompressible fluid indicated inequality 2.3 inertial effects isotropic Laun and Munstedt LDPE melt linear theory material constants Meissner Miinstedt 13 molecules Newtonian fluids Non-Newtonian Fluid nondimensional normal stress coefficient normal stress differ obtained parallel plates polyisobutylene polymer network polymeric liquids primary normal stress Raible Rheol rheology shear rate shear stress shown in Figs simple fluids simple shear slippage tensor soap solution given solid symbol steady elongational steady flow steady shear flow steady solution stress relaxation theory for elastic three polymer solutions tion viscoelastic viscometric functions viscosity and primary viscosity curve viscosity function