a 2a) Frequently in materials processing, a sheet or slab of material is produced continuously and must be cooled after

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A 2a Frequently In Materials Processing A Sheet Or Slab Of Material Is Produced Continuously And Must Be Cooled After 1 (16.02 KiB) Viewed 22 times

A 2a Frequently In Materials Processing A Sheet Or Slab Of Material Is Produced Continuously And Must Be Cooled After 2 (36.46 KiB) Viewed 22 times

a 2a) Frequently in materials processing, a sheet or slab of material is produced continuously and must be cooled after it leaves some processing device. This situation arises in polymer extrusion and in continuous casting of metals, for instance. The situation is sketched in Fig (2) below. 4T-TD 2H TET, sheet TOTS Fig 2
Assume that the sheet has a uniform temperature To as it leaves the upstream device, and that it moves with a constant velocity V. The thickness of the sheet is 2 Cooling is accomplished by exposing the sheet to a coolant (usually air or water), and it may involve either free or forced convection. The cooling is characterized by a heat transfer coefficient h and a coolant temperature 1) Write the energy equation and simplify it by nsuming a two-dimensional temperature distribution, steady-state behavior, constant properties, and no heat sources. ii) Determine the required boundaryanatial conditions 2b) What is turbulence modeling? (11) In CFD, what is validation and verification? (111) What are the resodunls calculated in CFX? How are they being used to obtain a CFD solution? Equations . pep The Energy Equation in the three-dimensional Cartesian coordinates (xy.2) is: aT AT OT т ( ᎧᎢ ᎧᏰᎢ ᎧᎢ + u + V + w + in at дх ду д (Ory Where T=temperature, t=time, p = density. = specific heat, u, V and w = components of the velocity vector in the x.y, and z directions k = thermal conductivity, and is the rate of heat generation А 2