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Dissipation In Quantum Turbulence In Superfluid He-4 Above 1 K

Title: Dissipation In Quantum Turbulence In Superfluid He-4 Above 1 K.
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Name(s): Gao, J., author
Guo, W., author
Yui, S., author
Tsubota, M., author
Vinen, W. F., author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-05-29
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: There are two commonly discussed forms of quantum turbulence in superfluid He-4 above 1 K: in one there is a random tangle of quantized vortex lines, existing in the presence of a nonturbulent normal fluid; in the second there is a coupled turbulent motion of the two fluids, often exhibiting quasiclassical characteristics on scales larger than the separation between the quantized vortex lines in the superfluid component. The decay of vortex line density, L, in the former case is often described by the equation dL/dt = -chi 2 (kappa/2 pi)L-2, where kappa is the quantum of circulation and chi(2). is a dimensionless parameter of order unity. The decay of total turbulent energy, E, in the second case is often characterized by an effective kinematic viscosity, v', such that dE/dt = -v'kappa L-2(2). We present values of chi(2 )derived from numerical simulations and from experiment, which we compare with those derived from a theory developed by Vinen and Niemela. We summarize what is presently known about the values of v' from experiment, and we present a brief introductory discussion of the relationship between chi(2 )and v', leaving a more detailed discussion to a later paper.
Identifier: FSU_libsubv1_wos_000433287200005 (IID), 10.1103/PhysRevB.97.184518 (DOI)
Keywords: decay, heat current, mutual friction, liquid helium-ii
Publication Note: The publisher’s version of record is available at https://doi.org/10.1103/PhysRevB.97.184518
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000433287200005
Owner Institution: FSU
Is Part Of: Physical Review B.
2469-9950
Issue: iss. 18, vol. 97

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Gao, J., Guo, W., Yui, S., Tsubota, M., & Vinen, W. F. (2018). Dissipation In Quantum Turbulence In Superfluid He-4 Above 1 K. Physical Review B. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000433287200005