Liquid food is heated in a tubular heat exchanger.  The inner pipe wall temperature is 110 ° C.  The internal diameter of the pipe is 25 mm.  The product flows at 0.5 kg / s If the initial temperature of the product is 7 ° C, calculate the convective heat transfer coefficient.  The thermal properties of the product are as follows.  specific heat = 3.7 kJ / (kg ° C), thermal conductivity = 0.6 W / (m  ° C), product viscosity = 500 x 10 Pa s, density = 1000 kg / m !! product viscosity at 110 ° C = 410  x 106 Pa s Find Reynold's number = Find the Pranti number = Find the Nuselt number =

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Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.