PPT-Heat and mass transfer Prepared by : Prof .Dr / Hesham Mostafa

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. Analogies. Heat .  Mass  . (sometimes). Momentum. Analogies are useful tools. An aid to understand transfer phenomena. A sound means . t. o predict behavior of systems for which limited quantitative data are available. Kostic. ’s. . Research . &. Scholarly Interests and Activities. Fundamentals . and . Application . of . Energy. www.kostic.niu.edu. The . Fundamental Laws of . Nature:. The Laws of Thermodynamics. 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. GraphG prof 1 prof 2 prof 3 prof 4 phd 5 stud 6 stud 7 adv adv adv adv adv sup sup GraphI 1 prof 2,3 prof 4 prof 5 phd 6,7 stud adv adv adv sup 1Fortheformaldevelopmentinthispaper,itwillbeconve-nientt This case of heat transfer happens in different situations.. It is complicated process occupies an important side in applied mathematics to find a solution for Fourier’s low as a partial differential . Summary of Equations of Change.  . Summary of Equations of Change. Summary of Equations of Change.  . The momentum molecular flux, .  . * .  . molecular . stresses = pressure + viscous stresses. Summary of Equations of Change. Sara Duclos, Kayla Eckley, Joseph McGrath, Department of Chemical Engineering, University of New Hampshire. Introduction. Objectives. Methods. Results. Design Problem. References. Condensers are involved within systems in order to cool an environment with the evaporation and condensation of a fluid. Fins and Extended Surfaces. 1. Chapter 3c : One-dimensional, Steady state conduction (with thermal energy generation) (Section 3.5 – Textbook). 2. 3.1 Implications of energy generation. Involve a local source of thermal energy due to conversion from another form of energy in a conducting medium.. 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). How does heat energy get from the Sun to the Earth?. There are no particles between the Sun and the Earth so it CANNOT travel by conduction or by convection. . ?. RADIATION. How can we relate our new understanding to the greenhouse effect?. Essential Standard. 6.P.. 3 Understand . characteristics . of energy . transfer and interactions of matter and energy.. Clarifying Objective. 6.P.. 3.1 Illustrate . the transfer of heat energy from warmer objects . Flows from higher-temperature object to lower-temperature object. System. (T. 1. ). Surroundings. (T. 2. ). Heat. If T. 1. > T. 2. q . system. = -. exothermic. System. (T. 1. ). Surroundings. (T. 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.. Dr. J. . Badshah. Professor and Head, Dairy Engineering. SANJAY GANDHI INSTITUTE OF DAIRY TECHNOLOGY. (Bihar Animal Sciences University, Patna). Email: ejazbadshah@gmail.com. Modes of Heat Transfer. Conduction.