Water at temperature T infinity = 20 [ degree C] flows along a wall held at temp

Question

Water at temperature T infinity = 20 [ degree C] flows along a wall held at temperature Tw = 47 [ degree C]. At a particular location along the wall the temperature distribution in the water is carefully measured as a function of y, where y is the distance along a line normal to the wall measured in [m] (y = 0 on the wall and y > 0 in the fluid). This temperature distribution is described by the following relation T - T / T - T = 1 - e- , a = 390.6 [1 / m] Find the local heat transfer coefficient at this location; Find the rate of heat loss from the wall to the water; For the wall made of brick (density rho = 3010 [kg/m3], conductivity k = 2.3 [W/m degree K], specific heat c = 838 [J/kg degree K]) find temperature gradient in [ degree /m] in the wall right at the surface.

Explanation / Answer

in the equation is it Ts or what,and if so then what is Ts

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