is considered to be zero and the viscosity of fluid can be considered to be infinite, thus leading to zero fluid velocity. As such, the temperature and efficient thermal conductivity of the special fluid and solid are the same, that is to say,
is considered to be zero and the viscosityof fluid can be considered to be infinite, thus leading to zero fluidvelocity. As such, the temperature and efficient thermal conductivityof the special fluid and solid are the same, that is to say,