HEAT TRANSFER IN PURE CRITICAL FLUIDS SURROUNDED BY FINITELY CONDUCTING BOUNDARIES IN MICROGRAVITY

Debruijn R.; Karapantsios TD.; Michels AC.; Wakeham WA. Trusler JPM.; Vandiest RJJ.

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HEAT TRANSFER IN PURE CRITICAL FLUIDS SURROUNDED BY FINITELY CONDUCTING BOUNDARIES IN MICROGRAVITY

机译：有限重力微边界包围的纯临界流体的传热

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The behaviour of a near-critical sample of SF6, bounded by container walls with finite thermal properties, was studied in space during the 1994 IML-2 mission. Experiments were performed in the range 2500 to 1 mK above the critical point in which simultaneous density and temperature measurements are conducted during a number of transient heating runs. The results of these measurements show clearly that a fast isentropic thermalization takes place uniformly throughout the sample, with essentially no effect on existing temperature and density gradients. The temperature rise caused by the isentropic thermalization is described quantitatively by a theoretical expression which takes into account the finite thermal impedance of the cell walls. It has been possible to do so in a manner that satisfactorily represents the observations. The success of this description enables the separation of isentropic thermalization from true heat transport effects, thereby opening the way to a determination of the thermal diffusivity of the fluid at temperatures as close as 1 mK to the critical temperature. In addition, the observed isentropic compressive heating mechanism suggests a new way for assessing specific important thermodynamic properties in the critical region, based on the experimental determination of the isentropic thermal expansion coefficient. [References: 23]

机译：在1994 IML-2任务期间，在太空中研究了SF6的近临界样品的行为，该样品以具有有限热特性的容器壁为边界。在临界点以上2500至1 mK的范围内进行实验，在此过程中，在许多瞬态加热过程中同时进行密度和温度测量。这些测量的结果清楚地表明，在整个样品中均发生了快速的等熵热化，而对现有的温度和密度梯度几乎没有影响。由等熵热化引起的温度升高通过理论表达式定量地描述，该理论表达式考虑了单元壁的有限热阻。这样做可以令人满意地表示观察结果。该描述的成功使等熵热化与真正的热传输效应分离，从而为确定在接近临界温度1 mK的温度下流体的热扩散率开辟了道路。另外，基于等熵热膨胀系数的实验确定，观察到的等熵压缩加热机理为评估临界区中特定的重要热力学性质提出了一种新的方法。 [参考：23]

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《Physica, A. Statistical mechanics and its applications》 |1997年第2期|共22页
作者
Debruijn R.; Karapantsios TD.; Michels AC.; Wakeham WA. Trusler JPM.; Vandiest RJJ.;
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正文语种 eng
中图分类物理学;
关键词
Critical region; Heat transport; Adiabatic effect; Vapor critical-point; Component fluid; Gravity;

机译：临界区;传热;绝热效应;蒸气临界点;组成流体;重力;

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1. HEAT TRANSFER IN PURE CRITICAL FLUIDS SURROUNDED BY FINITELY CONDUCTING BOUNDARIES IN MICROGRAVITY [J] . Debruijn R., Karapantsios TD., Michels AC., Physica, A. Statistical mechanics and its applications . 1997,第1a2期

机译：有限重力微边界包围的纯临界流体的传热
2. Solution of boundary layer flow and heat transfer of an electrically conducting micropolar fluid in a non-Darcian porous medium [J] . Domairry G., Ziabakhsh Z. Meccanica: Journal of the Italian Association of Theoretical and Applied Mechanics . 2012,第1期

机译：非达西多孔介质中边界层流动和导电微极性流体传热的求解
3. Heat transfer in a pure near-critical fluid: diffusive and convective regimes in He-3 [J] . Kogan AB., Meyer H., Murphy D. Physica, B. Condensed Matter . 2000,第Pta1期

机译：纯近临界流体中的热传递：He-3中的扩散和对流形式
4. Finite Difference Schemes of Unsteady Boundary Layer Flow and Heat Transfer over a Stretching Surface in a Micropolar Fluid [C] . NIKOS E. MASTORAKIS WSEAS International Conferences . 2009

机译：在微柱液中的拉伸表面上的不稳定边界层流动的有限差分方案和传热
5. AN EXPERIMENTAL STUDY ON NATURAL CONVECTION HEAT TRANSFER OF NON-NEWTONIAN FLUIDS FROM HORIZONTAL WIRES (RHEOLOGY, POLYMER SOLUTION, POWER-LAW, PURELY VISCOUS, VISCOELASTIC). [D] . NG, MOSES LUNGFAI. 1985

机译：水平线非牛顿流体自然对流传热的实验研究（流变学，聚合物溶液，幂律，纯粘性，粘弹性）。
6. Unsteady Boundary Layer Flow and Heat Transfer of a Casson Fluid past an Oscillating Vertical Plate with Newtonian Heating [O] . Abid Hussanan, Mohd Zuki Salleh, Razman Mat Tahar, 2010

机译：卡森流体的不稳定边界层流动和热交换通过牛顿热经过振荡垂直板的传递
7. Discussion: “Force Convection Heat Transfer at an Inclined and Yawed Square Plate—Application to Solar Collectors” (Sparrow, E. M., and Tien, K. K., 1977, ASME J. Heat Transfer, 99, pp. 507–512) and “Local Heat Transfer and Fluid Flow Characteristics for Airflow Oblique or Normal to Square Plate” (Tien, K. K., and Sparrow, E. M., 1979, Internation Journal of Heat and Mass Transfer, 22, pp. 349–359) and “Effect of Finite Width on Heat Transfer and Fluid Flow about an Inclined Rectangular Plate” (Sparrow, E. M., Ramsey, J. W., and Mass, E. A., 1979, ASME J. Heat Transfer, 101, pp. 199–204) [O] . B. Nimmo, S. Zubair 1981

机译：讨论：“在倾斜和偏航的方形板应用于太阳能收集器的强制对流传热”（Sparrow，EM和Tien，KK，1977，Asme J.传热，99，PP。507-512）和“局部热量用于气流倾斜或正常板的转移和流体流动特性“（Tien，KK和Sparrow，EM，1979，热量和传质杂志，22，pp.349-359）和”有限宽度对热量的影响关于倾斜矩形板的转移和流体流动“（Sparrow，EM，Ramsey，JW和Mass，EA，1979，ASME J.传热，101，PP。199-204）
8. Graphical Presentation of Difference Solutions for Transient Radial Heat Conduction in Hollow Cylinders with Heat Transfer at the Inner Radius and Finite Slabs with Heat Transfer at One Boundary [R] . Hatch, J. E., Schacht, R. L., Albers, L. C., 1960

机译：内部半径传热空心圆柱瞬态径向热传导与一边界传热有限板的差分解的图解表示

HEAT TRANSFER IN PURE CRITICAL FLUIDS SURROUNDED BY FINITELY CONDUCTING BOUNDARIES IN MICROGRAVITY

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