Significance of Rarefaction, Streamwise Conduction, and Viscous Dissipation on the Extended Graetz–Nusselt Problem: The Case of Finite-Length Microchannels with Prescribed Wall Heat Flux
Joint Authors
Brasiello, Antonio
Adrover, Alessandra
Source
International Journal of Chemical Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-08-25
Country of Publication
Egypt
No. of Pages
15
Abstract EN
The article addresses the extended Graetz–Nusselt problem in finite-length microchannels for prescribed wall heat flux boundary conditions, including the effects of rarefaction, streamwise conduction, and viscous dissipation.
The analytical solution proposed, valid for low-intermediate Peclet values, takes into account the presence of the thermal development region.
The influence of all transport parameters (Peclet Pe, Knudsen Kn, and Brinkman Br) and geometrical parameters (entry length and microchannel aspect ratio) is investigated.
Performances of different wall heat flux functions have been analyzed in terms of the averaged Nusselt number.
In the absence of viscous dissipation Br=0, the best heating protocol is a decreasing wall heat flux function.
In the presence of dissipation Br>0, the best heating protocol is a uniform wall heat flux.
American Psychological Association (APA)
Brasiello, Antonio& Adrover, Alessandra. 2020. Significance of Rarefaction, Streamwise Conduction, and Viscous Dissipation on the Extended Graetz–Nusselt Problem: The Case of Finite-Length Microchannels with Prescribed Wall Heat Flux. International Journal of Chemical Engineering،Vol. 2020, no. 2020, pp.1-15.
https://search.emarefa.net/detail/BIM-1169425
Modern Language Association (MLA)
Brasiello, Antonio& Adrover, Alessandra. Significance of Rarefaction, Streamwise Conduction, and Viscous Dissipation on the Extended Graetz–Nusselt Problem: The Case of Finite-Length Microchannels with Prescribed Wall Heat Flux. International Journal of Chemical Engineering No. 2020 (2020), pp.1-15.
https://search.emarefa.net/detail/BIM-1169425
American Medical Association (AMA)
Brasiello, Antonio& Adrover, Alessandra. Significance of Rarefaction, Streamwise Conduction, and Viscous Dissipation on the Extended Graetz–Nusselt Problem: The Case of Finite-Length Microchannels with Prescribed Wall Heat Flux. International Journal of Chemical Engineering. 2020. Vol. 2020, no. 2020, pp.1-15.
https://search.emarefa.net/detail/BIM-1169425
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1169425