The heat flux that is applied to the left face of a plane wall is q′′=20 W/m2. The wall is of thickness L = 10 mm and of thermal conductivity k=12 W/m∙K. If the surface temperatures of the wall are measured to be 50 ℃ on the left side and 30 ℃ on the right side, do steady-state conditions exist? slader

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)