Thermomechanical correction to the drag force on a sphere and a cylinder moving in HeII

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00682333· OSTI ID:5572886

Palagin, A V ^[1]; Sobyanin, A A ^[2]

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1. Nuclear Safety Inst., Moscow (Russian Federation)
2. P. N. Lebedev Physical Inst., Moscow (Russian Federation)

The drag force on a sphere and a cylinder moving in HeII is considered on the basis of the full system of the two-fluid dissipative hydro-dynamical equations. It is shown, that due to the thermomechanical effect in superfluid there exists a specific correction to the drag force on a body. The value of this thermomechanical correction [Delta]F has the order of the ratio l[sub T]/R or l[sub T][sup 2]/R[sup 2] (R is the size of the body, and l[sub T] is the length of the formation of the convective heat flow). The value of [Delta]F grows at low temperatures, where l[sub T] is proportional to the characteristic time of the phonon-roton scattering process, and in the region near the [lambda]-point, where l[sub T] has the same temperature dependence as the order parameter correlation length l[sub T][approximately][xi][approximately](T[sub [lambda]][minus]T)[sup [minus]2/3]. The effects under discussion can be investigated experimentally by measurements of the mobility of small objects. A comparison is given with the data of the mobility of positive and negative ions in HeII near the [lambda]-point. 29 refs., 2 figs., 2 tabs.

• OSTI ID: 5572886
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 92:3-4; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

665420* -- Superfluidity-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CYLINDERS
DRAG
EVEN-EVEN NUCLEI
FLUID MECHANICS
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
HYDRODYNAMICS
ISOTOPES
LAMBDA POINT
LIGHT NUCLEI
MECHANICS
NUCLEI
PHYSICAL PROPERTIES
QUANTUM FLUIDS
SPHERES
STABLE ISOTOPES
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE