STUDY ON FORMATION MECHANISM OF THE FLOW DRAG AND HEAT TRANSFER REDUCTION EFFECT OF THE ORGANIC BRINE WITH SURFACTANT

2018 ◽  
Author(s):  
Naoto Haruki ◽  
Akihiko Horibe ◽  
Yutaka Yamada ◽  
Touru Kawaguchi
Keyword(s):  
Heat Transfer ◽  
Formation Mechanism ◽  
Reduction Effect ◽  
Flow Drag

Review on Microencapsulated Phase Change Materials (MPCM) Slurries: Materials, Rheological Behavior and Applications

2014 ◽  
Vol 953-954 ◽  
pp. 1109-1112 ◽  
Author(s):  
Pan Zhang ◽  
Zhong Zhu Qiu ◽  
Mei He
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Rheological Behavior ◽  
Phase Change Materials ◽  
High Heat ◽  
Building Energy Efficiency ◽  
High Heat Transfer ◽  
Microencapsulated Phase Change Materials ◽  
Reduction Effect ◽  
Flow Drag

Microencapsulated phase change materials (MPCM) slurries with high heat transfer and great latent heat can serve as both the heat transfer fluids and energy storage medias. Studies showed that the effective specific heat and heat transfer rate increased by 28.1% and 23.6% respectively as using MPCM slurries. The rheological behavior of slurries do not change as adding MPCM with low concentration, can be characterized by Newtonian fluid feature with mass fraction <0.25. MPCM particles have flow drag reduction effect under turbulent situation, which was applied to building energy efficiency and refrigeration, obtained remarkable energy conservation effect.

Flow drag and Heat transfer reduction effect of Brine solution by adding the surfactant

2003 ◽  
Vol 2003 (0) ◽  
pp. 409-410
Author(s):  
Naoto HARUKI ◽  
Hideo INABA ◽  
Akihiko HORIBE ◽  
Shinji TANAKA ◽  
Toru NAKATA ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Brine Solution ◽  
Reduction Effect ◽  
Flow Drag

Magnetogasdynamic Flow and Heat Transfer in a Microchannel

2011 ◽  
Author(s):  
Huei Chu Weng
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Joule Heating ◽  
Electromagnetic Force ◽  
Gas Flow ◽  
Velocity Slip ◽  
Flow And Heat Transfer ◽  
Electric And Magnetic Field ◽  
Flow Through ◽  
Flow Drag

The presence of current flow in an electric and magnetic field results in electromagnetic force and joule heating. It is desirable to understand the roles of electromagnetic force and joule heating on gas microflow and heat transfer. In this study, a mathematical model is developed of the pressure-driven gas flow through a long isothermally heated horizontal planar microchannel in the presence of an external electric and magnetic field. The solutions for flow and thermal field and characteristics are derived analytically and presented in terms of dimensionless parameters. It is found that an electromagnetic driving force can be produced by a combined non-zero electric field and a negative magnetic field and results in an additional velocity slip and an additional flow drag. Also, a joule heating can be enhanced by an applied positive magnetic field and therefore results in an additional temperature jump and an additional heat transfer.

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