Nowadays, progress in direct absorption solar collectors requires further investigations to realize heat transfer occurring a horizontal annulus cavity exposed external from different angles. An filled with nano-fluid is numerically simulated by using Ansys-Fluent for Rayleigh number equals 105. The wall of two-dimensional model the equally divided into six parts simulate heating isothermal wal...

In this paper, true and spurious eigensolutions for a circular cavity using the dual multiple reciprocity method (MRM) are analytically derived and numerically verified by the developed program. The roots of spurious eigenequation are found analytically by using symbolic manipulation software. A more efficient method is proposed by choosing a fewer number of equations from the dual MRM instead ...

Predicting how a young planet shapes the gas and dust emission of its parent disc is key to constraining presence unseen planets in protoplanetary observations. We investigate case 2 Jupiter mass that becomes eccentric after migrating into low-density cavity disc. Two-dimensional hydrodynamical simulations are performed post-processed by three-dimensional radiative transfer calculations. In our...

In this paper, a rigorous analysis of three stacked circular microstrip patches is performed using a dyadic Green’s functions formulation. The circular discs are embedded in a multilayered substrate containing isotropic and/or uniaxial anisotropic materials. A very efficient technique to derive the dyadic Green’s functions of the stacked configuration in the vector Hankel transform domain is pr...