Research Paper Heat and Mass Transfer
Effects of thermal diffusion and chemical reaction on MHD transient free convection flow past a porous vertical plate with radiation, temperature gradient dependent heat source in slip flow regime

S. Mohammed Ibrahim; K. Suneetha

Volume 5, Issue 2 , June 2016, Pages 83-95

  An analytical investigation is conducted to study the unsteady free convection heat and mass transfer flow through a non-homogeneous porous medium with variable permeability bounded by an infinite porous vertical plate in slip flow regime while taking into account the thermal radiation, chemical reaction, ...  Read More

Research Paper Heat and Mass Transfer
Effects of temperature gradient magnitude on bending angle in laser forming process of aluminium alloy sheets

Amir H. Roohi; H. Moslemi Naeini; M. Hoseinpour Gollo; J. Shahbazi Karami; Sh. Imani Shahabad

Volume 5, Issue 2 , June 2016, Pages 97-109

  Laser forming is a thermal forming process which uses laser beam irradiation to produce the desired final forms. In this article, the effect of temperature gradient across  Al 6061-T6 aluminum sheets on bending angle is studied. Input parameters including laser power, scan velocity, beam diameter, ...  Read More

Research Paper Heat and Mass Transfer
Diffusion-thermo effects on MHD free convective radiative and chemically reactive boundary layer flow through a porous medium over a vertical plate

J. Prakash; P. Durga Prasad; R. V. M. S. S. Kiran Kumar; S. V. K. Varma

Volume 5, Issue 2 , June 2016, Pages 111-126

  The main purpose of this work is to investigate the porous medium and diffusion-thermo effects on unsteady combined convection magneto hydrodynamics boundary layer flow of viscous electrically conducting fluid over a vertical permeable surface embedded in a high porous medium, in the presence of first ...  Read More

Research Paper Heat and Mass Transfer
Estimating the unknown heat flux on the wall of a heat exchanger internal tube using inverse method

M. Sh. Mazidi; M. Alizadeh; L. Nourpour; V. Shojaee Shal

Volume 5, Issue 2 , June 2016, Pages 127-136

  In the design of heat exchangers, it is necessary to determine the heat transfer rate between hot and cold fluids in order to calculate the overall heat transfer coefficient and the heat exchanger efficiency. Heat transfer rate can be determined by inverse methods. In this study, the unknown space-time ...  Read More

Research Paper Heat and Mass Transfer
Optimizing naturally driven air flow in a vertical pipe by changing the intensity and location of the wall heat flux

M. Rahimi; M. Khalafi-Salout

Volume 5, Issue 2 , June 2016, Pages 137-145

  Heat transfer from the internal surfaces of a vertical pipe to the adjacent air gives rise to the air flow establishment within the pipe. With the aim of optimizing the convective air flow rate in a vertical pipe, the details of the flow and thermal fields were investigated in the present study. Conservation ...  Read More

Research Paper Meshless Numerical Methods
Incompressible laminar flow computations by an upwind least-squares meshless method

M. Y. Hashemi

Volume 5, Issue 2 , June 2016, Pages 147-160

  In this paper, the laminar incompressible flow equations are solved by an upwind least-squares meshless method. Due to the difficulties in generating quality meshes, particularly in complex geometries, a meshless method is increasingly used as a new numerical tool. The meshless methods only use clouds ...  Read More

Research Paper Perturbation Technique
A study on the use of perturbation technique for analyzing the nonlinear forced response of piezoelectric microcantilevers

M. Zamanian; M. Hadilu; B. Firouzi

Volume 5, Issue 2 , June 2016, Pages 161-172

  In this paper, a comparison is made between direct and indirect perturbation approaches to solve the non-linear vibration equations of a piezoelectrically actuated cantilever microbeam. In this comparison, the equation of motion is considered according to Euler-Bernoulli theory with considering the non-linear ...  Read More