in this study prediction of the steady-state flow of branched polymer melts in pipe geometry with finite volume method is presented. our analysis in this study revealed that;for normal-stress tqq , the xpp model can predict this tensor unlike the other viscoelastic models such as ptt or gieskus which can not predict tqq for viscoelastic fluid in two dimensional pipe flows. the fluid is modelled...

Viscoelastic fluids widely exist in nature and industrial production, the study of their complex rheological properties has important academic value application significance. In this work, an improved smoothed particle hydrodynamics (SPH) method is proposed to numerically simulate viscoelastic flow based on eXtended Pom-Pom (XPP) model. order improve accuracy calculation, a kernel gradient corr...

In this study prediction of the steady-state flow of branched polymer melts in pipe geometry with finite volume method is presented. Our analysis in this study revealed that;for normal-stress tqq , the XPP model can predict this tensor unlike the other viscoelastic models such as PTT or Gieskus which can not predict tqq...

Abstract The elongational rheology of blends a polystyrene (PS) Pom-Pom with two linear polystyrenes was recently reported by Hirschberg et al. (J. Rheol. 2023, 67:403–415). PS280k-2x22-22k self-entangled backbone ( M w,bb = 280 kg/mol) and 22 entangled sidearms w,a at each the branch points blended weight fractions from 75 to 2 wt% having w 43 kg/mol (PS43k) 90 (PS90k), respectively. While pur...

One objective of this study is to assess the influence of the number of dangling arms at each end of the pom-pom molecule on flow characteristics in a 4:1 planar rounded-corner contraction, where varying the number of arms affects the level of entanglement in the system. For these complex flows, we evaluate the major influence of extensional viscosity and Trouton ratio when comparing kinematic-...

There are many effective chemothereutic agents used in influenza disease which some of them inhibit virus replication by interfering with FluV (influenza virus) viral binding or its penetration into cell membrane. A series of polyoxometalates compounds such as POM-523 and PM-504 have been synthesized and have showed inhibitory effects on viruses. In this study we examined anti influenza activit...