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Non‐Newtonian laminar pulsating heat and fluid flow in plane duct

Altunkaya, Ayse Nur / Aydin, Orhan / Avci, Mete

In the present study, laminar pulsating power‐law momentum and heat transfer in a uniformly heated plane duct is studied analytically. Assuming that fully developed conditions exist both hydrodynamically and thermally, a perturbation series method is utilized to derive analytical solutions for the momentum and energy balance equations, and the amplitude is prescribed as the perturbation parameter. For varying values of the power‐law index ( $n$ ), representing pseudoplastic, Newtonian, and dilatant fluids, effects of dimensionless amplitude ( $ϵ$ ) and frequency ( $F$ ) on periodic and period‐averaged friction factor and Nusselt number are obtained. The results obtained for Newtonian fluid are shown to be in good harmony with the corresponding findings in the open literature.

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Non‐Newtonian laminar pulsating heat and fluid flow in plane duct

Altunkaya, Ayse Nur / Aydin, Orhan / Avci, Mete

In the present study, laminar pulsating power‐law momentum and heat transfer in a uniformly heated plane duct is studied analytically. Assuming that fully developed conditions exist both hydrodynamically and thermally, a perturbation series method is utilized to derive analytical solutions for the momentum and energy balance equations, and the amplitude is prescribed as the perturbation parameter. For varying values of the power‐law index ( $n$ ), representing pseudoplastic, Newtonian, and dilatant fluids, effects of dimensionless amplitude ( $ϵ$ ) and frequency ( $F$ ) on periodic and period‐averaged friction factor and Nusselt number are obtained. The results obtained for Newtonian fluid are shown to be in good harmony with the corresponding findings in the open literature.

Non‐Newtonian laminar pulsating heat and fluid flow in plane duct

Altunkaya, Ayse Nur / Aydin, Orhan / Avci, Mete

In the present study, laminar pulsating power‐law momentum and heat transfer in a uniformly heated plane duct is studied analytically. Assuming that fully developed conditions exist both hydrodynamically and thermally, a perturbation series method is utilized to derive analytical solutions for the momentum and energy balance equations, and the amplitude is prescribed as the perturbation parameter. For varying values of the power‐law index ( $n$ ), representing pseudoplastic, Newtonian, and dilatant fluids, effects of dimensionless amplitude ( $ϵ$ ) and frequency ( $F$ ) on periodic and period‐averaged friction factor and Nusselt number are obtained. The results obtained for Newtonian fluid are shown to be in good harmony with the corresponding findings in the open literature.

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Title:

Non‐Newtonian laminar pulsating heat and fluid flow in plane duct

Contributors:

Altunkaya, Ayse Nur (author) / Aydin, Orhan (author) / Avci, Mete (author)

Published in:

Heat Transfer ; 53 ; 805-825

Publication date:

2024-03-01

Size:

21 pages

ISSN:

2688-4534 , 2688-4542

DOI:

https://doi.org/10.1002/htj.22976

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

heat transfer , plane duct , power‐law fluid , pulsating flow

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