ABSTRACT
When the second viscosity is taken into account, the equations of motion of helium II are, according to Eqs. 9-14 and 9-15 () ∂ j ∂ t + ∇ p + v S div j + ( j − ρ v S ) div v n + ( j ⋅ ∇ ) v S + ( v n ⋅ ∇ ) ( j − ρ v n ) = ∇ { ζ 1 div ( j − ρ v n ) + ζ 2 div v n } https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429502897/20d72e0b-9d39-4175-acc6-a943547edf8a/content/eq616.tif"/> () ∂ v S ∂ t + ( μ + v S 2 2 ) = ∇ { ζ 3 div ( j − ρ v n ) + ζ 4 div v n } https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429502897/20d72e0b-9d39-4175-acc6-a943547edf8a/content/eq617.tif"/>
