Unsteady flow and heat transfer past a stretching/shrinking sheet in a hybrid nanofluid

The experimental adsorption equilibrium of Cd(II) onto chitosan (Cd(II)/CS) and methyl orange onto bentonite (MO/Bt) were studied in batch adsorption experiments at room temperature for an initial concentration of 236.5 mg/L for Cd (II) (pH = 5) and 33 mg/L for MO (pH = 3). The adsorption rate increases rapidly for t

Critical of linear and nonlinear equations of pseudo-first order and pseudo-second order kinetic models

Dual solutions for mixed convective stagnation-point flow of an aqueous silica-alumina hybrid nanofluid

Due to the variation in fluid flow behavior in various physical conditions, the presented study have been performed an investigation of cross-fluid flow containing gyrotactic microorganisms and nanoparticles on a horizontal and three-dimensional cylinder considering viscous dissipation and magnetic field. The governing equations of the problem have been solved by the Runge-Kutta fifth-order method. The aim of this study is to inspect the effects of cross fluid, microorganisms, and magnetic field, on velocity, temperature, and concentration profiles. Also, Heat flux and mass flux values for nanoparticles and microorganisms have been calculated in tabular form. In this research, the simultaneous utilization of nanoparticles with motile microorganisms in cross fluid, and three-dimensional assessment on the cylinder has been proposed as an innovation. The results show that, when the Brownian motion parameter varies from 0.1 to 0.4 and at η = 4 , the concentration of nanoparticle deduces about 80.43%. Furthermore, with the change of bioconvection Lewis number from 0.2 to 0.5, it was observed that the concentration of the microorganisms reduced about 78.38%.

Investigation of cross-fluid flow containing motile gyrotactic microorganisms and nanoparticles over a three-dimensional cylinder

Nonlinear thermal radiation effect on magneto Casson nanofluid flow with Joule heating effect over an inclined porous stretching sheet

Investigation on thermophysical properties of Tio2–Cu/H2O hybrid nanofluid transport dependent on shape factor in MHD stagnation point flow

Boundary layer analysis of micropolar dusty fluid with TiO2 nanoparticles in a porous medium under the effect of magnetic field and thermal radiation over a stretching sheet

Semi-empirical modelling of hydraulic conductivity of clayey soils exposed to deionized and saline environments.

A Modified Two-Surface Plasticity Model for Saturated and Unsaturated Soils

The use of scaled experiments and physical models to investigate the complex responses of large-scale structures under high-rate loading is well-established. The approach however is recognised to suffer from deficiencies when substitute materials are involved as sought material-property combinations are not always available in readily accessible materials. This practical issue is one of scale effects where the behaviour of a scaled-physical model can depart sometimes markedly from the full-scale response. This was certainly the situation prior to the recent arrival of a new scaling theory called finite similitude with the establishment of new similitude rules but at the cost of additional scaled experiments at different scales. This paper examines the benefits of two scaled experiments in physical modelling to examine whether the existing problems posed by the paucity of material behaviours can be remedied by combining the results of two experimental trials at different scales. The focus here is on pressure-vessel response when exposed to projectiles and blast loading to provide non-trivial behaviours that are typically not easily captured with a single scaled experiment. The investigation is performed with the aid of a commercial finite element analysis software and the Conwep blast-loading analysis to reveal that the flexibility provided by two scaled models is significant. Although perfect replication of full-scale behaviour is not always achievable the ability to design scaled experiments with combinations of standard materials is shown to provide good levels of accuracy. 

H. Sadeghi

Papers

Investigation on thermophysical properties of Tio2–Cu/H2O hybrid nanofluid transport dependent on shape factor in MHD stagnation point flow

Boundary layer analysis of micropolar dusty fluid with TiO2 nanoparticles in a porous medium under the effect of magnetic field and thermal radiation over a stretching sheet

Semi-empirical modelling of hydraulic conductivity of clayey soils exposed to deionized and saline environments.

A Modified Two-Surface Plasticity Model for Saturated and Unsaturated Soils

A two-experiment approach to physical modelling: damage and failure under high-rate loading