The centrifugal spinning method is a recently invented technique to extrude polymer melts/solutions into ultra-fine nanofibres. Here, we present superior integrated string-based mathematical model, quantify the nanofibre fabrication performance in process. Our model enables us analyse critical flow parameters covering an extensive range, by incorporating angular momentum equations, Giesekus vis...

We report our studies of the linear and nonlinear rheology of aqueous solutions of the surfactant cetyl trimethylammonium tosylate (CTAT) with varying amounts of sodium chloride (NaCl). The CTAT concentration is fixed at 42mM and the salt concentration is varied between 0mM to 120mM. On increasing the salt (NaCl) concentration, we see three distinct regimes in the zero-shear viscosity and the h...

his paper reports finite-element simulations of drop deformation in converging flows in an xisymmetric conical geometry. The moving interface is captured using a diffuse-interface model nd accurate interfacial resolution is ensured by adaptive refinement of the grid. We have explored he effects of viscoelasticity on drop deformation when either the drop or the matrix is a Giesekus uid. Contrary...

We consider the system of partial differential equations governing two-dimensional flows a robust class viscoelastic rate-type fluids with stress diffusion, involving general objective derivative. The studied generalizes incompressible Navier--Stokes for fluid velocity $v$ and pressure $p$ by presence an additional term in constitutive equation Cauchy expressed terms positive definite tensor $B...

Migration of a particle in confined shear flow Giesekus fluids is investigated numerically with the method direct forcing/fictitious domain. We focus on migration direction for initial lateral position y0 and determination critical point yc moving towards center line or wall. The effect viscosity ratio μr, shear-thinning parameter α, Weissenberg number Wi, blocking rate β value analyzed. result...