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Heat Transfer

Heat Transfer for GATE Mechanical Engineering, one topic per lesson: the theory in plain words, the formulas, a solved example, and GATE-style questions (MCQ, MSQ and NAT) whose numerical answers are recomputed by a program when the site is built.

Start the first lesson

1Conduction

  1. Steady Conduction and Thermal ResistanceFourier's law, conduction through plane walls, cylinders and spheres, thermal resistance networks, overall heat transfer coefficient and critical radius of insulation.
  2. Fins and Transient ConductionHeat transfer from fins, fin efficiency and effectiveness, the fin parameter m, lumped capacitance analysis with the Biot and Fourier numbers, and time constants of thermocouples.

2Convection

  1. Forced and Natural ConvectionNewton's law of cooling, Nusselt, Prandtl, Reynolds and Grashof numbers, thermal boundary layers, standard correlations for plates and pipes, and natural convection.

3Radiation

  1. Radiation Heat TransferBlack body radiation, Stefan-Boltzmann and Wien's laws, emissivity and Kirchhoff's law, view factors and their rules, radiation between surfaces and radiation shields.

4Heat Exchangers

  1. Heat Exchangers: LMTD and Effectiveness-NTUTypes of heat exchangers, parallel and counter flow, log mean temperature difference, fouling, capacity ratio, effectiveness and NTU method, and boiling and condensation basics.