Nucleate pool boiling heat transfer and its ebullient dynamics in polymeric solutions at atmospheric pressure saturated conditions are experimentally investigated. Three grades of hydroxyethyl cellulose (HEC) are used, which have intrinsic viscosity in the range 5.29 ≤ [η] ≤ 10.31 [dl/g]. Their aqueous solutions in different concentrations, with zero-shear viscosity in the range 0.0021 ≤ η0 ≤ 0.0118 [N⋅s/m2], exhibit shear-thinning rheology in varying degrees, as well as gas–liquid interfacial tension relaxation and wetting. Boiling heat transfer in solutions with constant molar concentrations of each additive, which are greater than their respective critical polymer concentration C*, is seen to have anomalous characteristics. There is degradation in the heat transfer at low heat fluxes, relative to that in the solvent, where the postnucleation bubble dynamics in the partial boiling regime is dominated by viscous resistance of the polymeric solutions. At higher heat fluxes, however, there is enhancement of boiling heat transfer due to a complex interplay of pseudoplasticity and dynamic surface tension effects. The higher frequency vapor bubbling train with high interfacial shear rates in this fully developed boiling regime tends to be influenced by increasing shear-thinning and time-dependent differential interfacial tension relaxation at the dynamic gas–liquid interfaces.
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Research-Article
Pseudoplasticity and Dynamic Interfacial Tension Relaxation Effects on Nucleate Pool Boiling in Aqueous Polymeric Liquids
R. M. Manglik,
R. M. Manglik
Fellow ASME
Thermal-Fluids & Thermal Processing
Laboratory,
Department of Mechanical and Materials
Engineering,
University of Cincinnati,
Cincinnati, OH 45221-0072
e-mail: Raj.Manglik@uc.edu
Thermal-Fluids & Thermal Processing
Laboratory,
Department of Mechanical and Materials
Engineering,
University of Cincinnati,
Cincinnati, OH 45221-0072
e-mail: Raj.Manglik@uc.edu
1Corresponding author.
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A. D. Athavale
A. D. Athavale
Thermal-Fluids & Thermal Processing
Laboratory,
Department of Mechanical and
Materials Engineering,
University of Cincinnati,
Cincinnati, OH 45221-0072
Laboratory,
Department of Mechanical and
Materials Engineering,
University of Cincinnati,
Cincinnati, OH 45221-0072
2Present address: Seema Sales Pvt. Ltd., Pune 411038, India.
Search for other works by this author on:
R. M. Manglik
Fellow ASME
Thermal-Fluids & Thermal Processing
Laboratory,
Department of Mechanical and Materials
Engineering,
University of Cincinnati,
Cincinnati, OH 45221-0072
e-mail: Raj.Manglik@uc.edu
Thermal-Fluids & Thermal Processing
Laboratory,
Department of Mechanical and Materials
Engineering,
University of Cincinnati,
Cincinnati, OH 45221-0072
e-mail: Raj.Manglik@uc.edu
A. D. Athavale
Thermal-Fluids & Thermal Processing
Laboratory,
Department of Mechanical and
Materials Engineering,
University of Cincinnati,
Cincinnati, OH 45221-0072
Laboratory,
Department of Mechanical and
Materials Engineering,
University of Cincinnati,
Cincinnati, OH 45221-0072
1Corresponding author.
2Present address: Seema Sales Pvt. Ltd., Pune 411038, India.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received November 27, 2018; final manuscript received January 15, 2019; published online March 27, 2019. Assoc. Editor: Debjyoti Banerjee.
J. Heat Transfer. May 2019, 141(5): 051502 (10 pages)
Published Online: March 27, 2019
Article history
Received:
November 27, 2018
Revised:
January 15, 2019
Citation
Manglik, R. M., and Athavale, A. D. (March 27, 2019). "Pseudoplasticity and Dynamic Interfacial Tension Relaxation Effects on Nucleate Pool Boiling in Aqueous Polymeric Liquids." ASME. J. Heat Transfer. May 2019; 141(5): 051502. https://doi.org/10.1115/1.4042699
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