Experimental observations of a purely elastic flow instability occurring in the lid-driven cavity flow of two semi-dilute polymer solutions are reported and the effect of cavity aspect ratio on the dynamical structure of the unstable flow is quantitatively investigated. The spatial and temporal characteristics of the secondary flow are measured using flow visualization, laser Doppler velocimetr...

In this study, a numerical simulation is carried out investigation the mixed convection in an open lid _driven wall cavity attached to horizontal rectangular channel. Three different cases were considered depending on direction of moving sidewalls cavity. case(1), no walls assumed ; While for case (case 2) left sidewall moves downward, (case3) both and right are downward. A comparative case( ca...

In this study, the two-dimensional (2D), lid-driven cavity flow of chiral liquid crystals (LCs) was modelled using Landau de-Gennes (LdG) theory. Parametric studies investigating effect Er (Ericksen number) and Θ (chiral strength) on microstructure LCs were performed. we observed that an increase in caused texture to have more striations shorter pitch lengths as causes for increased number defe...

To study the mixed convection flows in a square double lid-driven cavity with various inclination angles, a numerical method based on the finite volume method is used. In this investigation Al2O3/water nanofluid with particle diameter of 47 nanometers in different solid volume fractions have been utilized. Flow is obtained by the top and bottom walls, which slide in opposite direction at consta...