An experimental study and numerical modeling of the flow in a network of microchannels - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Heat Transfer Engineering Année : 2005

An experimental study and numerical modeling of the flow in a network of microchannels

Résumé

The flow characteristics of a network of parallel microchannels (hydraulic diameter: 110 μm) are investigated both experimentally and numerically. The microchannel cross-section was triangular, as in the case of microheat pipes. The pressure drop across the microchannel network showed a dramatic increase with a departure from the law of fully developed flow in ducts as soon as the Reynolds number of the flow exceeded about 10. Numerical computation of the flow was carried out using the classical laws of hydrodynamics in an attempt to explain this surprising result. There was a good agreement with experimental results, which suggests that there are no size effects at the length scales used in the experiments. Moreover, the mechanisms responsible for the large pressure drop for higher Reynolds numbers were identified in the numerical analysis as being extra head losses due to separation in several parts of the test section.
Fichier principal
Vignette du fichier
Niklas.pdf (418.58 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00204657 , version 1 (07-02-2020)

Identifiants

Citer

Mariusz Niklas, Michel Favre-Marinet. An experimental study and numerical modeling of the flow in a network of microchannels. Heat Transfer Engineering, 2005, 26 (8), pp.15-23. ⟨10.1080/01457630591003673⟩. ⟨hal-00204657⟩

Collections

UGA CNRS OSUG LEGI
103 Consultations
79 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More