Online Quiz on Heat Transfer Modelling by Post Views: 140 Heat transfer is a part of thermal or mechanical engineering that concerns the generation, use, conversion, and exchange of thermal energy between physical objects 15 Created on January 24, 2023 By Dr. Sharad Pachpute Questions on Heat Transfer Fundamental questions on Heat Transfer and its numerical modeling are given in this quizEmail to get the Gift of the PDF booklet: cfdflowengineering@gmail.comif you score > 80%: 1 / 21 Which of the following methods is not used to discretize the Radiative Transport Equation for combustion Discrete Transfer Radiation Method P1- Radiation Model Discrete Radiation Model Surface Radiation Model 2 / 21 The radiative Heat transport equation is numerically solved for Surface Temperature Absorbing and scattering Gas Medium Absorbing and scattering Surfaces Medium Thermal Properties 3 / 21 Radiation heat transfer is determined by which law Kirchhoff's law Newtons Law of Cooling Thermodynamic laws Mass Conservation 4 / 21 The relation between momentum and thermal boundary layer is defined by which of the following parameter Velocity/Thermal diffusivity Viscosity of fluid/ Eddy viscosity Kinematic viscosity /Thermal diffusivity Turbulent Models 5 / 21 For turbulent heat transfer over a heated plate, the turbulent diffusivity is determined using Turbulent viscosity / Prandtl's Number Eddy viscosity/Laminar viscosity Mean Velocity Gradient Mean Temperature Gradient 6 / 21 Heat transfer coefficient in CFD simulation is calculated using Nusselt Number Correlation Reynolds and Prandtl's Number Energy balance to First Stationary Fluid Layer adjacent to wall Temperature gradient in thermal boundary layer 7 / 21 what is the unit of heat transfer coefficient? W/m2-k W/m-k W/m2 W/k4 8 / 21 For constant air properties, the forced convective heat transfer rate depends on Inlet Velocity Reynolds and Prandtl Number Temperature Gradients Properties of sold and fluid 9 / 21 Convective heat transfer is calculated by which of the reference temperature Surrounding Temperature (Ta) Fluid Temperature (Tf) Average of Inlet and surrounding Standard Temperature (Tst) 10 / 21 Thermal conductivity for anisotropic is defined as Scalar Vector Second Order Tensor Heat Flux Vector 11 / 21 Which of the following Laws is based on convective heat transfer between a surface and adjacent fluid Newtons Law of Cooling Fourier's Law Kirchhoff’s law First Law of Energy 12 / 21 For the homogenous material, the rate of heat transfer normal to the plane wall is given by which of the following equation? Q = 2kALx Q = 2k/L x Q = kA (T1-T2)/L Q = 2kAx/ L 13 / 21 The unit heat transfer is given as Joule Watt Pascal Calorie 14 / 21 which of the following law the heat transfer takes place? First Law of Thermodynamics Second Law of Thermodynamics Newtons Law of Cooling Kirchhoff's law of Radiation 15 / 21 Which of the following is a method of heat transfer? Conduction Convection Thermal Radiation All above 16 / 21 In natural convection, the source term due to buoyancy in the energy equation is calculated by Rayleigh number and Prandtl's Number Bounssinq hypothesis Reynolds number and Prandtl's Number Grashof 17 / 21 which of the following terms is added to compute turbulent convective transfer in RANS equations Turbulent Heat Diffusion Turbulent Advection Unsteady Term Mean Temperature Gradient 18 / 21 Which of the following radiation models accounts for the effect of flue gas composition on heat transfer weighted-sum-of-gray-gases (WSGG) model Discrete Radiation Model P1- Model Surface Radiation Model 19 / 21 In natural convection, the coefficient of expansion of fluid (β) for an ideal gas is calculated as ∆P/∆x ∆ρ/∆Tρ ∆P/∆Tρ 1/T 20 / 21 To compute the convective heat transfer from the heating surface which numerical scheme is used Central scheme SIMPLE Upwind PRESTO! 21 / 21 To compute the view factor for radiative heat transfer, which radiation model is used in CFD solver Discrete Radiation Model P1-Model DTRM Model Surface Radiation Your score is The average score is 66% LinkedIn Facebook Twitter VKontakte 0% Restart quiz