Articles Posted in the " Heat Transfer " Category



  • SYMBOLS IN HEAT TRANSFER —-3

    SYMBOLS IN HEAT TRANSFER —-3

    SYMBOLS IN HEAT TRANSFER —-3 q. =Q. Rate of heat transfer Used in Conduction, convection and radiation Watt  (W) q’ =Q’ Rate of heat transfer per meter Used cylindrical/ pipe /wire heat exchangers Watt / meter (W/m) q”=Q” rate of heat transfer per m2      = HEAT FLUX Used in conduction, convection and radiation W […]


  • SYMBOLS IN HEAT TRANSFER —-2

    SYMBOLS IN HEAT TRANSFER —-2

    SYMBOLS IN HEAT TRANSFER —-2 G Incident radiation flux used in radiocity (J) and radiation exchange between two bodies,  J = ЄEb + ρ G= (emitted + reflected) flux W/m2 h                 hi       ho film coefficient  Or convective HT Coefficient           […]


  • SYMBOLS IN HEAT TRANSFER —-1

    SYMBOLS IN HEAT TRANSFER —-1

      SYMBOLS IN HEAT TRANSFER                                                                                                                                                                    SYMBOL QUANTITY APPLICATION UNITS A Area (normal to the direction of heat transfer) Used in finding rate of heat transfer m2 Ac Cross sectional area (normal to the direction of heat transfer) Used in conduction through plane walls and fins m2 As Surface area (normal to the direction […]


  • Assumptions used in Heat Transfer

    Assumptions used in Heat Transfer

    Assumptions used in Heat Transfer  (a) Assumptions used in 1-dimensional Steady State heat conduction Homogeneous and isotropic fin material (Constant material properties) Higher temperature and lower temperatures remain constant. No internal heat generation One-dimensional conduction Uniform cross-sectional area Negligible contact thermal resistance Negligible radiation   (b) Assumptions used in Steady State heat Convection One-dimensional convection Homogeneous […]




  • *Multiple Choice Questions (mcq) on Heat Transfer —-Conduction

    *Multiple Choice Questions (mcq) on Heat Transfer —-Conduction

    Multiple Choice Questions (mcq) on Heat Transfer —-Conduction Thermal conductivity of metals with addition of alloying elements (a) Increases (b) Decreases (c) Remains constant (d) None (Ans: b) Thermal conductivity of metals with increase of hardness (a) Increases (b) Decreases (c) Remains constant (d) None (Ans: b) Thermal conductivity of a material with dampness (a) Increases […]


  • *Multiple Choice Questions (mcq) on Heat Transfer —-Conduction

    *Multiple Choice Questions (mcq) on Heat Transfer —-Conduction

    Multiple Choice Questions (mcq) on Heat Transfer —Conduction Poisson’ equation in heat transfer deals with (a) Steady state of heat transfer (b) Unsteady state of heat transfer (c) Steady as well as unsteady states of heat transfer (d) None (Ans: a) Laplace equation in heat transfer deals with (a) Steady state of heat transfer (b) Unsteady […]