Abstract: Penetrative convection due to purely internal heating in a horizontal ferrofluid-saturated porous layer is examined by performing linear stability analysis. Four different types of heat supply functions are considered. The Darcy model is used to incorporate the effect of the porous medium. Numerical solutions are obtained by using the Chebyshev pseudospectral method, and the results a...

Magnetic pore fabrics (MPFs) serve as efficient proxy for alignment and preferential flow directions. Anisotropy of magnetic susceptibility impregnated samples reflects the shape arrangement ferrofluid-filled pores. Reliable interpretation requires that entire connected space is reached by ferrofluid. This study investigates impregnation efficiencies various methods (standard vacuum, pressure i...

In this paper, the theoretical study on laminar boundary-layer flow of ferrofluid with influences magnetic field and thermal radiation is investigated. The viscosity over a solid sphere surface examined theoretically for magnetite volume fraction by using equations. governing equations are derived applied non-similarity transformation then solved numerically utilizing Keller-box method. It foun...

The interplay of buoyancy and thermo-magnetic convection mechanisms are investigated in a horizontal ferrofluid layer heated from one wide side and cooled from another in the presence of external uniform transversal magnetic field. The influence of gravitational settling of magnetic particles and their aggregates on heat transfer and convection instability is also considered. The ferro-colloids...

The use of genetically modified organisms (GMOs) as food and in food products is becoming more and more widespread. Polymerase chain reaction (PCR) technology is extensively used for the detection of GMOs in food products in order to verify compliance with labeling requirements. In this paper, we present a novel close-loop ferrofluid-driven PCR microchip for rapid amplification of GMOs. The mic...