QB4: Introduction to CFD a) A 20-mm thick flat steel plate, initially at a uniform temperature of 280°C throughout, has

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Qb4 Introduction To Cfd A A 20 Mm Thick Flat Steel Plate Initially At A Uniform Temperature Of 280 C Throughout Has 1 (82.15 KiB) Viewed 24 times

QB4: Introduction to CFD a) A 20-mm thick flat steel plate, initially at a uniform temperature of 280°C throughout, has one isothermal face and the other face suddenly quenched by water jets at 20°C. Quenched face Isothermal face Use 4 segments with Fourier number = 1/2. For steel, thermal conductivity k = 40 W/mK, specific heat capacity Cp= 500 J/kg K and density p = 8000 kg/m3 (0) For the Fourier number (Fo) and the material properties given above, calculate the time-step (At) in seconds. [3 Marks] (ii) Determine the temperature distribution within the plate 5 seconds after quenching begins using explicit method. The finite difference approximation of explicit scheme is given by: Tpt = Fote + Fo Tw + (1 - 2FTP [12 Marks] (iii) State any assumptions made and comment on the solutions obtained. [5 Marks] b) Describe FIVE major factors which affect the accuracy of CFD model results. [5 Marks] [TOTAL 25 Marks]