0
Research Papers: Evaporation, Boiling, and Condensation

# Laminar Filmwise Condensation on Horizontal Disk Embedded in Porous Medium With Suction at Wall

[+] Author and Article Information
Tong-Bou Chang

Department of Mechanical Engineering, Southern Taiwan University, Tainan County, Taiwan 710tbchang@mail.stut.edu.tw

J. Heat Transfer 130(7), 071502 (May 19, 2008) (8 pages) doi:10.1115/1.2909075 History: Received March 29, 2007; Revised September 26, 2007; Published May 19, 2008

## Abstract

This study performs a theoretical investigation into the problem of two-dimensional steady filmwise condensation flow on a horizontal disk embedded in a porous medium layer with suction at the disk surface. The analysis considers the case of a water-vapor system and is based on typical values of the relevant dimensional and dimensionless parameters. Due to the effects of capillary forces, a two-phase zone is formed between the liquid film and the vapor zone. The minimum mechanical energy concept is employed to establish the boundary condition at the edge of the horizontal disk and the Runge–Kutta shooting method is used to solve the second-order nonlinear ordinary differential equation of the liquid film. It is found that the capillary force and wall suction effects have a significant influence on the heat transfer performance. Specifically, the results show that the dimensionless heat transfer coefficient depend on the Darcy number Da, the Jacob number Ja, the effective Rayleigh number $Rae$, the effective Prandtl number $Pre$, the suction parameter $Sw$, and the capillary parameter $Boc$.

<>

## Figures

Figure 1

Condensate film flow on horizontal disk in porous medium with suction at wall

Figure 2

Variation of dimensionless film thickness in radial direction

Figure 3

Variation of local Nusselt number in radial direction as function of Sw

Figure 4

Variation of Nu¯ with Ja as function of Sw and Da for constant Rae=2×1011, Pre=1.76, and Boc=6.1×105

Figure 5

Variation of Nu¯ with Pre as function of Ja and Sw for constant Rae=2×1011, Da=6.4×10−10, and Boc=6.1×105

Figure 6

Variation of Nu¯ with Da as function of Ja and Sw for constant Rae=2×1011, Pre=1.76, and Boc=6.1×105

Figure 7

Variation of Nu¯ with Rae as function of Ja and Sw for constant Da=6.4×10−10, Pre=1.76, and Boc=6.1×105

Figure 8

Variation of Nu¯ with Sw as function of Ja for Da=6.4×10−10, Pre=1.76, Rae=2×1011, and Boc=6.1×105

Figure 9

Variation of Nu¯ with Boc as function of Ja and Sw for constant Da=6.4×10−10, Pre=1.76, and Rae=2×1011

## Discussions

Some tools below are only available to our subscribers or users with an online account.

### Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related Proceedings Articles
Related eBook Content
Topic Collections

• TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
• EMAIL: asmedigitalcollection@asme.org