A water flow enters the circular tube (right plot) at a uniform
temperature T(r,0) that is less than the surface temperature,
convection heat transfer occurs and a thermal boundary layer begins
to develop. (a) Please explain the requirements (criteria) to reach
thermal fully developed condition for both constant surface and
heat flux boundary conditions. Ice bath is covering the outer
surface of a thick‐walled circular Teflon tube (k = 0.5 W/m · K)
which has an inner and outer radii of 30 and 50 mm. Water flows
through the tube at a rate of 𝑚̇ = 0.5 kg/s, and its mean inlet and
outlet temperatures are Tm,i = 80°C and Tm,o = 20°C. (b) What is
the length of the tube if the whole tube is in fully developed
region? (c) what is the average convection coefficient associated
with the water flow? PROPERTIES: Water (Tm=323K): cp= 4200 J/kg‧K,
=550x10-6 kg/s‧m, k=0.64 W/m‧K, Pr=3
- A Water Flow Enters The Circular Tube Right Plot At A Uniform Temperature T R 0 That Is Less Than The Surface Tempera 1 (180.97 KiB) Viewed 48 times
Surface condition T, > T6,0) 9 y-r-r Tiro) 1 T T (0) Tiro) 1 T Tiro) A water flow enters the circular tube (right plot) at a uniform temperature T(r,0) that is less than the surface temperature, convection heat transfer occurs and a thermal boundary layer begins to develop. (a) Please explain the requirements (criteria) to reach thermal fully developed TUT condition for both constant surface and heat flux boundary conditions. Ice bath is covering the Fully developed region outer surface of a thick-walled circular Teflon tube (k = 0.5 W/m · K) which has an inner and outer radii of 30 and 50 mm. Water flows through the tube at a rate of m=0.5 kg/s, and its mean inlet and outlet temperatures are Tm,i = 80°C and Tm,o= 20°C. (b) What is the length of the tube if the whole tube is in fully developed region? (c) what is the average convection coefficient associated with the water flow? Thermal entrance region Tau PROPERTIES: Water (Tm=323K): Cp=4200 J/kg:K, 4F550x10-6 kg/s'm, k=0.64 W/m-K, Pr=3