TITLE

Boundary effects near the superfluid transition (BEST), an experiment proposed for the ISS

AUTHOR(S)
Ahlers, Guenter; Finley, Paul; Genio, Edgar; Kuehn, Kerry; Liu, Feng-Chuan; Liu, Yuan-Ming; Mehta, Sarabjit; Murphy, Daniel
PUB. DATE
January 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 504 Issue 1, p662
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We review the opportunities for microgravity measurements of the thermal resistivity R(L,t) near the bulk superfluid-transition line T[sub λ](P) of [sup 4]He confined in cylindrical geometries with axial heat flow. A scaling function is used to estimate R as a function of the cylinder radius L and of the pressure P. These predictions are used to assess the effect of gravity on potential Earth-based measurements. Radii L>=8 μm can only be investigated fully in micro-gravity. At higher pressures the gravity effect is larger. At 30 bar samples with L>=4 μm require microgravity. Modern thermometry has sufficient resolution to permit quantitative measurements of the finite-size effect for L as large as 50 μm, the size chosen for the proposed ISS experiment BEST. © 2000 American Institute of Physics.
ACCESSION #
5985060

 

Related Articles

  • High temperature expansion for a chain model. Rojas, Onofre; de Souza, S. M.; Thomaz, M. T. // Journal of Mathematical Physics;Mar2002, Vol. 43 Issue 3, p1390 

    We consider an arbitrary translationally invariant chain model with nearest neighbors interaction and satisfying periodic boundary condition. The approach developed here allows a thermodynamic description of the chain model directly in terms of grand potential per site. This thermodynamic...

  • Stochastic shape functions and stochastic strain–displacement matrix for a stochastic finite element stiffness matrix. Dasgupta, Gautam // Acta Mechanica;Jan2008, Vol. 195 Issue 1-4, p379 

    For conventional finite element problems, element geometry is adequate to determine shape functions. However, to account for secondary effects due to material randomness, conventional shape functions need to be modified according to the spatial fluctuation of constitutive variables in each Monte...

  • EFECTOS DE CONFINAMIENTO EN MUESTRAS MESOSCÓPICAS SUPERCONDUCTORAS. Pasaje, A.; Calero, J. M.; Granada, J. C.; Da Silva, E. Z. // Revista Colombiana de Física;2007, Vol. 39 Issue 2, p443 

    The most important feature of a mesoscopic superconductor is that its shape and size have an essential effect on the physical properties of the superconducting condensate. Usually this effect is investigated via the Ginzburg-Landau (GL) equations, solved together with the conventional boundary...

  • Thermodynamics of Irreversible Processes across a Boundary: Elementary Principles. Honig, Jurgen M. // Applied Physics Research;2011, Vol. 3 Issue 2, p3 

    The commonly used thermodynamic variables are generalized so as to take account of irreversible processes across a thin boundary separating a system from its surroundings. This permits one to relate heat transfer and work performance in irreversible processes to those carried out reversibly. The...

  • Strain gradient elasticity within the symmetric BEM formulation. Terravecchia, S.; Panzeca, T.; Polizzotto, C. // Frattura e Integrita Strutturale;2014, Issue 29, p61 

    ABSTRACT. The symmetric Galerkin Boundary Element Method is used to address a class of strain gradient elastic materials featured by a free energy function of the (classical) strain and of its (first) gradient. With respect to the classical elasticity, additional response variables intervene,...

  • Tuning of dimensionless figure of merit via boundary scattering in In2O3-δ. Kinemuchi, Yoshiaki; Guilmeau, Emmanuel; Lebedev, Oleg I.; Maignan, Antoine // Journal of Applied Physics;Dec2011, Vol. 110 Issue 12, p124304 

    In this paper, the dimensionless figure of merit (ZT) is optimized using the scattering in nanocrystals (NCs) of Zr-doped In2O3-δ. The effect of boundary scattering on the thermoelectric properties of the NCs was analyzed using the Boltzmann transport equation and Debye-Callaway model. A ZT...

  • Free Surface Modeling in OWC Chamber with Parabolic Side Walls using 3D BEM. Hasanabad, Madjid Ghodsi // AIP Conference Proceedings;2015, Vol. 1648 Issue 1, p1 

    In this paper, BEM was used for free surface modeling in OWC chamber and out of it. Linear kinematic and dynamic boundary conditions were used for free surface out of OWC chamber and nonlinear forms were used for free surface in the chamber. These boundary conditions were discretized by finite...

  • Classification of binary systems. Serafimov, L.; Frolkova, A.; Illarionov, V. // Theoretical Foundations of Chemical Engineering;Jun2011, Vol. 45 Issue 3, p337 

    No abstract available.

  • On a Question of Gowers. Vu, V.H. // Annals of Combinatorics;2002, Vol. 6 Issue 2, p229 

    Demonstrates that the bound in the regularity lemma can be improved in the perfect triangle problem. Definition of an empty set; Presentation of arithmetic progressions.

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics