TY - JOUR
T1 - Three-Dimensional Coupled Dynamics of the Two-Fluid Model in Superfluid He 4
T2 - Deformed Velocity Profile of Normal Fluid in Thermal Counterflow
AU - Yui, Satoshi
AU - Tsubota, Makoto
AU - Kobayashi, Hiromichi
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant No.17K05548 and MEXT KAKENHI luctuation and Structure Grant No.16H00807. S.Y. was supported by Grant-in-Aid for JSPS Fellow Grant No.JP16J10973. The work of H.K. is supported in part by the MEXT-Supported Program for the Strategic Research Foundation at Private Universities Topological Science (Grant No.S1511006) and Keio Gijuku Academic Development Funds.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/4/9
Y1 - 2018/4/9
N2 - The coupled dynamics of the two-fluid model of superfluid He4 is numerically studied for quantum turbulence of the thermal counterflow in a square channel. We combine the vortex filament model of the superfluid and the Navier-Stokes equations of normal fluid. Simulations of the coupled dynamics show that the velocity profile of the normal fluid is deformed significantly by superfluid turbulence as the vortices become dense. This result is consistent with recently performed visualization experiments. We introduce a dimensionless parameter that characterizes the deformation of the velocity profile.
AB - The coupled dynamics of the two-fluid model of superfluid He4 is numerically studied for quantum turbulence of the thermal counterflow in a square channel. We combine the vortex filament model of the superfluid and the Navier-Stokes equations of normal fluid. Simulations of the coupled dynamics show that the velocity profile of the normal fluid is deformed significantly by superfluid turbulence as the vortices become dense. This result is consistent with recently performed visualization experiments. We introduce a dimensionless parameter that characterizes the deformation of the velocity profile.
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U2 - 10.1103/PhysRevLett.120.155301
DO - 10.1103/PhysRevLett.120.155301
M3 - Article
C2 - 29756900
AN - SCOPUS:85045265964
SN - 0031-9007
VL - 120
JO - Physical review letters
JF - Physical review letters
IS - 15
M1 - 155301
ER -