Author/Authors :
Rahman, M.M. Bangladesh University of Engineering and Technology - Department of Mathematics, Bangladesh , Billah, M.M. Ahsanullah University of Science and Technology - Department of Arts and Sciences, Bangladesh , Rahim, N.A. university of malaya - UM Power Energy Dedicated Advanced Centre (UMPEDAC), Malaysia , Amin, N. university of malaya - UM Power Energy Dedicated Advanced Centre (UMPEDAC), Malaysia , Saidur, R. university of malaya - UM Power Energy Dedicated Advanced Centre (UMPEDAC) - Department of Mechanical Engineering, Malaysia , Hasanuzzaman, M. university of malaya - UM Power Energy Dedicated Advanced Centre (UMPEDAC), Malaysia
Abstract :
A numerical model is presented for the simulation of double-diffusive natural convection in a triangular solar collector. This design is encountered in greenhouse solar stills where vertical temperature and concentration gradients between the saline water and transparent cover induce flows in a confined space. This phenomenon plays an important function in the water distillation process and in the biological comfort. In this doublediffusion problem, the ratio Br of the relative magnitude thermal and compositional buoyancy and Rayleigh numbers are key parameters. Finite element technique is used to solve the governing equations. Numerical results are presented for the effect of the abovementioned parameters on local heat and mass transfer rate. In addition, results for the average heat and mass transfer rate are offered and discussed for the mentioned parametric conditions. Some interesting results are found in this investigation.
Keywords :
Solar collector , Double , diffusion , Finite element method , Saline water , Transparent cover
