Numerical study on the effect of surface wettability on the falling film flow characteristics of the spiral wound tube heat exchanger

Article Engineering, Chemical

Characterization of column flow regimes on horizontal tubes for falling-film systems: An experimental approach

Prudviraj Kandukuri et al.

Summary: The research investigates the evolution process and characteristics of column flow regimes in falling-film evaporators, and reveals the relationship between the parameters and the diameter of liquid jet and the coverage of liquid film. These findings are important for preventing dry spots and flooding in operation.

ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING (2022)

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Article Thermodynamics

Numerical study on the flow and heat-transfer characteristics of horizontal finne d-tub e falling-film evaporation: Effects of liquid column spacing and wettability

Chuanpeng Cao et al.

Summary: The study established an effective computational fluid dynamics (CFD) model to investigate the flowing and heat transfer characteristics of horizontal finned-tube falling-film evaporation. The numerical results were validated by experimental data. The study explored the influences of liquid column feed spacing and Reynolds number on the hydrodynamic and heat transfer characteristics, as well as the effect of contact angle on the fluid behavior and heat transfer performance.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2022)

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Article Mechanics

Three-dimensional film thickness distribution of horizontal tube falling film with droplet and sheet flow

Xueshuo Chen et al.

Summary: The flow characteristics of droplet and sheet flow in horizontal tube falling film were investigated through experiments and simulations. The results provide detailed insights into the flow characteristics and identify the factors influencing the film thickness.

INTERNATIONAL JOURNAL OF MULTIPHASE FLOW (2022)

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Article Thermodynamics

Numerical simulation of falling film flow hydrodynamics over round horizontal tubes

Avijit Karmakar et al.

Summary: This study utilized three-dimensional numerical simulations to investigate the hydrodynamic behavior of a falling film over horizontal round tubes with diameter and tube-to-tube spacings each of 16 mm. The results showed the variation of the liquid film thickness and interface velocity over the tube surface for different flow modes.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Engineering, Chemical