PPT-SUPPLEMENT LECTURE ON NATURAL CONVECTION OF HEAT TRANSFER

ON HEAT TRANSFER COEFFICIENT h OF FLUIDS IN CONTACT WITH SOLIDS OF DIFFERENT TEMPERATURE IN NATURAL CONVECTIVE HEAT TRANSFER for Bonus Quiz No 6 of ME 130 Course on Applied Engineering Analysis. Aim. Calculate local natural convection heat-transfer coefficients for a sphere. Calculate the local boundary layer . Calculate experimental mean Nusselt number. Compare experimental and theoretical Nusselt numbers. 4.1 …………. Introduction and Types of Fins. 4.2 …………. Governing Equation of Fin. 4.3 …………. Heat Dissipation through Rectangular Fin. 4.4 …………. Heat Dissipation from Infinitely Long Fin. Heat Transfer. Energy transfer from a . HOTTER. object to a . COOLER. one. Heat Transfer. Energy transfer from a . HOTTER. object to a . COOLER. one. How is heat transferred? (3 Ways). Heat Transfer. Heat and Work transfer. (quantitatively). Thermodynamics & Heat Transfer. Thermodynamics. Heat Transfer. Study of . “How heat flows”. every activity involves heat transfer. . Driving Potential. . Convection Heat Transfer . Why is it windy at the seaside?. Cold air sinks. Where is the freezer compartment put in a fridge?. Freezer compartment. It is put at the top, because cool air sinks, so it cools the food on the way down.. Introduction to Convection. Convection denotes energy transfer between a surface and a fluid moving over the surface.. The dominant contribution due to the bulk (or gross) motion of fluid particles.. Answer . the following questions with your partner on a piece of paper to turn in:. What are the 5 stages to the water cycle?. How do clouds form?. What is the heat source for the water cycle?. Where does water run off to in the water cycle?. To Make Foldable:. 1. On the short side of the paper, fold it down an inch.. 2. Now fold it in half, hamburger style.. 3. Now fold it in 1/3.. Conduction. Convection . Radiation. Heat Transfer. Examples. Conduction Convection . Radiation. Types of Heat transfer. Heat Transfer. Heat can be transferred in 3 ways. Conduction. Convection. Radiation. Heat flow depends on the temperature difference – . flows from hot to cold. T. Tomm 2019. Heat Transfer. This Photo. by Unknown Author is licensed under . CC BY-NC-ND. What type of camera can measure temperatures?. A. Spectral B. Conductive C. Thermal. Which type of heat transfer occurs when heat moves through a piece of metal, such as a metal spoon? . Why is it windy at the seaside?. Cold air sinks. Where is the freezer compartment put in a fridge?. Freezer compartment. It is put at the top, because cool air sinks, so it cools the food on the way down.. . Eng. . Abdelrhman Essam. Free convection and Radiation. Convection . Convection Heat transfer can be classified into;. 1- forced convection . 2- free convection.. Introduction to free convection. presence of bulk fluid motion and by conduction in the absence of it. Therefore,. conduction in a fluid can be viewed as the limiting case of convection, corresponding to the case of quiescent fluid (Fig. 6–1).. Nimesh Gajjar. CONVECTIVE HEAT TRANSFER. . Convection heat transfer involves . fluid motion . heat conduction. The fluid motion enhances the heat transfer, since it brings hotter and cooler chunks of fluid into contact, initiating higher rates of conduction at a greater number of sites in fluid. Therefore, the rate of heat transfer through a fluid is much higher by convection than it is by conduction. In fact, the higher the fluid velocity, the higher the rate of heat transfer..