قرآن كا تصور ارض

The Almighty Allah has exhibited His quality and power of Creation through bringing into existence of this Universe and several creatures in it. Amongst these creatures, are the earth and the skies. According to Islamic doctrine, Allah the Almighty created seven skies. Similarly, he created seven earths, "This is the only Allah who has created seven skies and the same numbers ofearths where His order is obeyed. So that you may know that Allah is the omni-potent and He has circumpassed all the things by His power ofknowledge. In the present article, efforts have been made to know the literal meaning ofthe term "Ardh", which standfor the earth in Arabic. Basic kinds and subsequently the different terms used by the holy Quran for Ardh have been discussed with special refrence to Tabqatul Ardh (layers of earth) . The paper aims to illuminate that the Quran has numerous secrets of universe which need to be discovered in the best interest of the humanity

Steady Flow of Fluids With Variable Viscosity

Nanofluids have wide range applications in processes involving heat transfer due to their proficient thermal conductivity. Such fluids exhibit substantial viscosity variation with temperature. This dissertation presents oblique stagnation point flow of variable viscosity nanofluid over a stretching surface. Porous medium, magnetic field, heat generation, thermal radiation and homogeneous-heterogeneous effects along with partial slip, thermal slip and convective surface are considered. Micro-rotation phenomenon is also fused with nanofluid flow comprising micropolar nanofluid. Nanofluid thermal conductivity is estimated by Maxwell-Garnett model, Hamilton Crosser thermal conductivity model is also employed when shape effects of nanoparticles are considered. Flow problems are first modeled and afterwards converted to non-linear system of ODEs via appropriate similarity transformations. Numerical solutions are obtained via stable and efficient Runge-Kutta-Fehlberg scheme with shooting quadrature and Keller-Box scheme. The impact of key emerging dimensionless parameters on non-dimensional normal, tangential velocity constituents, temperature, shear stress (at wall), heat flux along with streamlines distribution is visualized by graphs.