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Heat Transfer in a Falling Laminar Liquid Film with In-Depth Radiation Absorption
1Fire Research Division, Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, U.S.A.
This study analyzes heat transfer in a falling liquid film with surface heat flux and in-depth radiation absorption. In-depth thermal radiation significantly impacts the overall heat transfer process in the liquid film.
Area of Science:
- Heat Transfer
- Fluid Dynamics
- Radiative Heat Transfer
Background:
- Steady-state heat transfer in falling liquid films is crucial in various industrial applications.
- Understanding the influence of surface heat flux and volumetric absorption is essential for accurate thermal modeling.
Purpose of the Study:
- To analyze heat transfer in a vertical falling liquid film with constant surface heat flux and in-depth thermal radiation absorption.
- To investigate the effects of dimensionless parameters on the heat transfer characteristics.
Main Methods:
- Formulation of nondimensionalized governing equations for the heat transfer problem.
- Numerical solution of the formulated equations.
- Demonstration of effects using sample calculations.
Main Results:
- The study reveals the significant role of in-depth thermal radiation absorption in the heat transfer process.
- Dimensionless parameters were shown to influence the heat transfer characteristics of the liquid film.
Conclusions:
- In-depth thermal radiation absorption is a key factor in the heat transfer of falling liquid films.
- Numerical analysis provides valuable insights into the thermal behavior of such systems.
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