28 June 2015 to 2 July 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Natural convection effect on the temperature fluctuation in a cylinder enclosure with supercritical helium.docx

Not scheduled
2h
JW Marriott Starr Pass Resort

JW Marriott Starr Pass Resort

Tucson, Arizona USA
Poster Presentation CEC-12 - Fluid Mechanics, Heat Transfer, and Cryogen Properties

Speaker

Dr gang zhou (Technical Institute of Physics and Chemistry, CAS)

Description

A numerical study is performed for time-varying natural convection of helium fluid at low temperatures in a bottom wall heated cylinder enclosure. The numerical results are analyzed in detail to show the damping of the temperature fluctuation amplitude from the cold up wall to the hot down wall, which is characterized by the ratio of the fluctuation amplitude of down wall and up wall. Fluid flow field, thermal field and heat transfer are analyzed for some particular situations through the streamlines and isotherms. Based on the simulation results, the effects of thermal conductivity of walls and inclined angles of the enclosure on the damping of temperature fluctuation amplitude are studied. Numerical computations provide methods of decaying the propagation of the fluctuation amplitude through the fluid and wall, which have great importance in high precision temperature control at low temperature system cooled by cryocooler.

Primary author

Dr Kongrong Li (Technical Institute of Physics and Chemistry,CAS)

Co-authors

Dr bin dong (Technical Institute of Physics and Chemistry, CAS) Mr bo bai (Huazhong University of Science and Technology) Dr gang zhou (Technical Institute of Physics and Chemistry, CAS)

Presentation Materials

There are no materials yet.