QUANTITATIVE STUDIES OF NONLINEAR 2ND SOUND IN SUPERFLUID HE-4

被引：19

作者：

GOLDNER, LS ^{[1
]}

AHLERS, G ^{[1
]}

MEHROTRA, R ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,CTR NONLINEAR STUDIES,SANTA BARBARA,CA 93106

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.43.12861

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Experimental studies of the nonlinear evolution in time of planar second-sound pulses in superfluid He-4 have been carried out at temperatures 2 to 25 mK below T-lambda. The pulse evolution in helium is compared to solutions of the Burgers equation, and corrections for the effect of the heater and bolometer substrates are made by numerical integration of the heat-diffusion equation with appropriate boundary conditions. Agreement between measured and calculated pulse shapes is found to be excellent. Fits to the data of the model are used to obtain the linear second-sound velocity. A new method for studying the critical behavior of second sound very close to T-lambda, where nonlinear effects are always important, is suggested.

引用

页码：12861 / 12873

页数：13

共 45 条

[11] THERMAL CONDUCTIVITY AND HEAT CAPACITY OF 7740 PYREX BELOW 4 DEGREES K AND IN MAGNETIC FIELDS TO 90 KG [J].

FISHER, RA ;

BRODALE, GE ;

HORNUNG, EW ;

GIAUQUE, WF .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1968, 39 (01) :108-&

[12] THE EVOLUTION OF AXISYMMETRIC RECTANGULAR 2ND-SOUND (HEAT) PULSES IN SUPERFLUID-HELIUM [J].

FISZDON, W ;

PERADZYNSKI, Z ;

STAMM, G .

PHYSICS OF FLUIDS A-FLUID DYNAMICS, 1989, 1 (05) :881-886

[13] SECOND-SOUND VELOCITY, SCALING, AND UNIVERSALITY IN HE II UNDER PRESSURE NEAR SUPERFLUID TRANSITION [J].

GREYWALL, DS ;

AHLERS, G .

PHYSICAL REVIEW LETTERS, 1972, 28 (19) :1251-&

[14] SECOND-SOUND VELOCITY AND SUPERFLUID DENSITY IN HE-4 UNDER PRESSURE NEAR TLAMBDAL [J].

GREYWALL, DS ;

AHLERS, G .

PHYSICAL REVIEW A, 1973, 7 (06) :2145-2162

[15] 2ND SOUND ATTENUATION IN LIQUID HELIUM-II [J].

HANSON, WB ;

PELLAM, JR .

PHYSICAL REVIEW, 1954, 95 (02) :321-327

[16]

HOLLAND L, 1956, VACUUM DEPOSITION TH, pCH5

[17]

IZNANKIN AY, 1983, ZH EKSP TEOR FIZ, V57, P801

[18]

Khalatnikov I.M., 1965, INTRO THEORY SUPERFL

[19] ON NON-LINEAR PROFILE OF HEAT PULSE IN LIQUID HE-2 [J].

KITABATAKE, S ;

SAWADA, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1978, 45 (01) :345-346

[20]

KITTEL C, 1958, ELEMENTARY STATISTIC, pCH29

← 1 2 3 4 5 →