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Abstract <p>Experimental data of the superfluid helium dynamics in a U-shaped cylindrical channel filled with metal balls of equal diameter are presented. The description of the experimental cell and the results of the investigations are given in the form of time dependences of the vapor–liquid interface position on time. The values of oscillations amplitudes and frequencies at different pressures and conditions of experiments are presented for two diameters of backfill particles. The causes of oscillations, the possibility of a stationary state, as well as changes in the character of heat and mass transfer processes at the transition through <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11823_2025_422_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda\)</EquationSource> <!--JEnTher2502004Puzina-m1--> </InlineEquation>-point are discussed.</p>

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Influence of Monodisperse Backfill Particle Diameter on Oscillations of Superfluid Helium–Vapor Interface in a U-Shaped Channel

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • Yu. Yu. Puzina,
  • A. P. Kryukov

摘要

Abstract

Experimental data of the superfluid helium dynamics in a U-shaped cylindrical channel filled with metal balls of equal diameter are presented. The description of the experimental cell and the results of the investigations are given in the form of time dependences of the vapor–liquid interface position on time. The values of oscillations amplitudes and frequencies at different pressures and conditions of experiments are presented for two diameters of backfill particles. The causes of oscillations, the possibility of a stationary state, as well as changes in the character of heat and mass transfer processes at the transition through \(\lambda\) -point are discussed.