Laminar film condensation on an elliptical tube embedded in porous media

Effects of uniform suction and surface tension on laminar filmwise condensation on a horizontal elliptical tube in a porous medium

“…However, in practical problems involving condensation in porous media, the effective pore radii are not very small. Consequently, the effects of capillary suction are generally neglected in most previous studies of heat transfer in a porous medium [4][5][6][7]9,11,12,16,18].…”

“…In practical engineering applications, laminar condensation in a porous medium is not restricted to flat, vertical surfaces, but may occur on surfaces with various geometrical profiles and orientations. As a result, researchers have explored a wide variety of condensation systems, including horizontal disks [7,8], wavy surfaces [9,10], horizontal elliptical tubes [11,12], and so forth. If the effective pore radii of the porous media are very small, these studies have shown that the capillary force induced by the porous medium is instrumental in improving the rate of heat transfer in condensation systems embedded within porous media [13][14][15].…”

Theoretical study of superheated vapor effect on liquid film condensation in a saturated porous medium using Forchheimer's model

“…The results found that surface tension forces had an effect of enhancing the condensation heat transfer and a closed‐form expression for the Nusselt number was obtained. Kibboua and Azzi 26 employed the Darcy–Brinkman–Forchheimer model to describe the laminar film condensation on a horizontal elliptical tube embedded in a porous medium filled with a dry saturated vapor for free and forced convection, The numerical results presented in the form of local film thickness and local Nusselt number that depends on dimensionless parameters. Duwairi 27 presented numerical solutions for the effect of thermal radiation on mixed convection of optically dense viscous fluids about a nonisothermal cylinder and sphere.…”