Skip to main content
Article thumbnail
Location of Repository

Modeling in-situ vapor extraction during flow boiling in microscale channel

By 

Abstract

Graduation date: 2013Access restricted to the OSU Community at author's request from March 25, 2013 - March 25, 2014In-situ vapor extraction is performed by applying a pressure differential across a hydrophobic porous membrane that forms a wall of the channel as a means of reducing the local quality of flow boiling within the channel. As the local quality is reduced, the heat transfer capability can be improve while large pressure drops and flow instability can be mitigated. The present study investigates the potential of vapor extraction, by examining the characteristics and mechanisms of extraction. The physics based models for transition among extraction regimes are developed which can be used as a basis for a regime-based vapor extraction rate model. The effects of vapor extraction on flow boiling in a microscale fractal-like branching network and diverging channels are studied by using a one-dimensional numerical model based on conservation of mass and energy, along with heat transfer and pressure drop correlations. The results show the improvement in reduced pressure drop and enhanced flow stability, and show the potential of heat transfer enhancement

Topics: Vapor extraction, Venting, Vapor separation, Two-phase flow, Flow boiling, Heat transfer, Regime map, Extraction map, One-dimensional model, Numerical model, Flow instability
Year: 2013
OAI identifier: oai:ir.library.oregonstate.edu:1957/37774
Provided by: ScholarsArchive@OSU
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://hdl.handle.net/1957/377... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.