This work aims at examining the thermophoresis and Brownian motion characteristics on stagnation point flow of Cross nanofluid over a permeable stretching /contracting surface. Flow equations are modelled by means Buongiorno model. The transformed non-linear fluid transport solved numerically through Runge-Kutta Fehlberg (RKF) approach. temporal stability test is executed to reveal behaviour du...

background: peak expiratory flow rate (pefr) is recommended as a tool for control of asthma. the purpose of this study was to determine the normal value of pefr in the healthy high school children in babol, iran. methods: this study was conducted on 470 healthy high school children (285 girls, 185 boys with the age between 14-18 years). for the determination of pefr we used mini wright peak flo...

in the present study a quasi 2-d numerical model is developed for calculating air concentration distribution in rapid flows. the model solves air continuity equation (convection diffusion equation) in the whole flow domain. this solution is then coupled with calculations of the free surface in which air content in the flow is also considered. to verify the model, its results are compared with a...

A computational method is presented for analyzing free surface flows of polymer solutions with the conformation tensor. It combines methods of computing Newtonian free surface flows [J. Comp. Phys. 99 (1992) 39; V.F. deAlmeida, Gas–Liquid Counterflow Through Constricted Passages, Ph.D. thesis, University of Minnesota, Minneapolis, MN, 1995 (Available from UMI, Ann Arbor, MI, order number 961516...

nowadays, compressible flow transmission pipelines are used in many industrial processes. pipelines in chemical processes, gas turbine power plants, natural gas transmission lines, and high pressure steam transmission pipelines are some industrial examples. therefore, learning the manner of treatment of a transient compressible fluid flow in pipelines with junctions and branches is important. i...

We study the linear stability of Poiseuille flow a viscoelastic upper convected Maxwell fluid in which rheological parameters depend on concentration particles suspended (dense suspension with negligible diffusion). After determining basic and profile we consider temporal three dimensional perturbation form stream-wise span-wise wave. derive linearized perturbed equation prove validity Squire’s...

The analysis in this communication addresses the unsteady MHD flow of tangent hyperbolic liquid through a vertical plate. model on mass and heat transport is set up with Joule heating, generation, viscous dissipation, thermal radiation, chemical reaction Soret-Dufour form partial differential equations (PDEs). PDEs are simplified into dimensionless by utilizing suitable quantities. solved spect...

We present special numerical techniques for non-Newtonian flows including non-isothermal, shear/pressure dependent and particularly viscoelastic effects which are based on the logconformation reformulation (LCR), including Oldroyd-B and Giesekus-type fluids as prototypical models. We utilize a fully coupled monolithic finite element approach which treats the velocity, pressure, temperature and ...

this is a report on the study of high melt flow, highly isotactic polypropylene homopolymer synthesized in liquid monomer using a fifth generation ziegler-natta catalytic system. at highest catalyst productivity, the response of thecatalyst to hydrogen as chain transfer is studied. melt flow rate is controlled by hydrogen as chain transfer from 0.4 to 300 g/10min with changing the amount of hyd...

We present a new algorithm to simulate unsteady viscoelastic flows in abrupt contraction channels. In our approach we split the viscoelastic terms of the Oldroyd-B constitutive equation using Duhamel s formula and discretize the resulting PDEs using a semi-implicit finite difference method based on a Lax–Wendroff method for hyperbolic terms. In particular, we leave a small residual elastic term...