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Effects of Wettability on the Flow Boiling Heat Transfer Enhancement

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Fluid Mechanics and Fluid Power, Volume 5 (FMFP 2022)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

In this paper, we have investigated the role of surface wettability during subcooled flow boiling in a microchannel heat sink. The Cahn–Hilliard phase field method is used to numerically simulate the bubble nucleation from a single artificial cavity inside a microchannel heat sink. The pressure and velocity distribution inside the microchannel is studied at different time levels. Further, simulations have been performed by varying the surface wettability of the heater surface to investigate the role of surface wettability in flow boiling. The role of bubble dynamics and heat transfer characteristics have been studied for different wettabilities of the heating surface. The bubble departure time increases with the decrease in the wettability of the heater surface.

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Abbreviations

Cp:

Specific heat, (J/kg K)

R:

Bubble radius, (m)

T:

Temperature, (°C)

u:

Velocity (m/s)

Vf:

Volume fraction

K:

Thermal conductivity (W/cm-K)

\(\dot{m}\):

Mass flow rate (kg/m2s)

K:

Thermal conductivity (W/cm-K)

L:

Latent heat (J/kg)

P:

Pressure (Pa)

ρ:

Density, (kg/m3)

φ:

Phase field variable

\(q^{\prime \prime }\):

Heat flux (W/cm2)

CHF:

Critical heat flux

CA:

Contact angle

HTC:

Heat transfer coefficient

v:

Vapor

l:

Liquid

sat:

Saturation

References

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, IIT Patna, Patna, 801106, India

    Akash Priy, Israr Ahmad, Manabendra Pathak & Mohd. Kaleem Khan

Authors
  1. Akash Priy
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  2. Israr Ahmad
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  3. Manabendra Pathak
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  4. Mohd. Kaleem Khan
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Corresponding author

Correspondence to Akash Priy .

Editor information

Editors and Affiliations

  1. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Krishna Mohan Singh

  2. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Sushanta Dutta

  3. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, India

    Sudhakar Subudhi

  4. Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India

    Nikhil Kumar Singh

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Priy, A., Ahmad, I., Pathak, M., Khan, M.K. (2024). Effects of Wettability on the Flow Boiling Heat Transfer Enhancement. In: Singh, K.M., Dutta, S., Subudhi, S., Singh, N.K. (eds) Fluid Mechanics and Fluid Power, Volume 5. FMFP 2022. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-99-6074-3_70

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  • DOI: https://doi.org/10.1007/978-981-99-6074-3_70

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-99-6073-6

  • Online ISBN: 978-981-99-6074-3

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