In this paper, we study theoretically the natural convective boundary-layer flow of a nanofluid past a vertical plate. The model used for the nanofluid incorporates the effects of Brownian motion and thermophoresis. A similarity solution is developed. The similarity transformations are applied to reduce the governing partial differential equations to a set of nonlinear coupled ordinary differen...

Measuring parameters such as stability and conformation of biomolecules, especially of nucleic acids, is important in the field of biology, medical diagnostics and biotechnology. We present a thermophoretic method to analyse the conformation and thermal stability of nucleic acids. It relies on the directed movement of molecules in a temperature gradient that depends on surface characteristics o...

This paper reports an experimental investigation of the dust particle deposition process on solar photovoltaic (PV) modules with different surface temperatures by a heating plate to illustrate the effect of the temperature difference (thermophoresis) between the module surface and the surrounding air on the dust accumulation process under different operating temperatures. In general, if the tem...

We study the Soret effect of charged polystyrene particles as a function of temperature and electrolyte composition. As a main result we find that the Soret coefficient is determined by charge effects, and that non-ionic contributions are small. In view of the well-known electric-double layer interactions, our thermal field-flow fractionation data lead us to the conclusion that the Soret effect...

A long standing goal is the direct optical control of biomolecules and water for applications ranging from microfluidics over biomolecule detection to non-equilibrium biophysics. Thermal forces originating from optically applied, dynamic microscale temperature gradients have shown to possess great potential to reach this goal. It was demonstrated that laser heating by a few Kelvin can generate ...

This article addresses the steady three-dimensional flow of an Oldroyd-B nanofluid over a bidirectional stretching surface with heat generation/absorption effects. Suitable similarity transformations are employed to reduce the governing partial differential equations into coupled nonlinear ordinary differential equations. These nonlinear ordinary differential equations are then solved analytica...

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...