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| Titel: |
AN ANALYSIS OF FLOW FILM BOILING OVER AN INCLINED SURFACE EMBEDDED IN POROUS MEDIA |
| Auteur: |
Bigzadeh, E. Orozco, J. |
| Verschenen in: |
Chemical engineering communications |
| Paginering: | Jaargang 137 (1995) nr. 1 pagina's 119-133 |
| Jaar: |
1995 |
| Inhoud: |
The rate of heat dissipation during flow film boiling from inclined surfaces embedded in porous media is investigated both theoretically and experimentally. The theoretical model relies on the well established Darcy model for the flow both inside the vapor layer and inside the forced convection layer surrounding the vapor film. The main focus is to study the effects of wall temperature, liquid subcooling, wall suction, and orientation of the heated surface on the heat transfer phenomenon. The resulting similarity equations are integrated numerically by use of the fourth-order Runge Kutta method. Systematic “shooting” is required to satisfy the boundary conditions at the liquid-vapor interface and at infinity. Results are reported for the behavior of the vapor film thickness and both the local and average heat transfer coefficients as a function of vapor superheat and liquid subcooling. Experiments were conducted in Freon-113 and a porous medium consisting of 2.8 mm glass beads to verify the theoretical findings, and excellent agreement was found between theory and experiments. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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