MECh300H Introduction to Finite Element Methods

Slides:



Advertisements
Similar presentations
FEA Course Lecture V – Outline
Advertisements

BESSEL’S EQUATION AND BESSEL FUNCTIONS:
Chapter 2 Introduction to Heat Transfer
Introduction to Finite Element Methods
Heat Transfer Chapter 2.
Chapter 2: Overall Heat Transfer Coefficient
Chapter 2: Steady-State One-Dimensional Heat Conduction
MECH300H Introduction to Finite Element Methods
Chapter 11 Heat Transfer FUNDAMENTALS OF THERMAL-FLUID SCIENCES, 5th edition by Yunus A. Çengel and Michael A. Boles.
Modes of Heat Transfer P M V Subbarao Professor Mechanical Engineering Department Accounting of Natural Happenings …..
DR.PRADIP DUTTA Department of Mechanical Engineering Indian Institute of Science Bangalore.
CHAP 5 FINITE ELEMENTS FOR HEAT TRANSFER PROBLEMS
© Fluent Inc. 8/10/2015G1 Fluids Review TRN Heat Transfer.
Flow and Thermal Considerations
Heat Transfer Rates Conduction: Fourier’s Law
Deduction of Fundamental Laws for Heat Exchangers P M V Subbarao Professor Mechanical Engineering Department I I T Delhi Modification of Basic Laws for.
Introduction to Heat Transfer
Heat Transfer in Structures
STEADY HEAT TRANSFER AND THERMAL RESISTANCE NETWORKS
CHAPTER 2 ONE-DIMENSIONAL STEADY STATE CONDUCTION
1 CHAPTER 5 POROUS MEDIA Examples of Conduction in Porous Media component electronic micro channels coolant (d) coolant porous material (e) Fig.
1 Convection Boundary Condition –Happens when a structure is surrounded by fluid –Does not exist in structural problems –BC includes unknown temperature.
INTRODUCTION TO CONDUCTION
Biosystems engineering
ENT 255 HEAT TRANSFER BASICS OF HEAT TRANSFER. THERMODYNAMICS & HEAT TRANSFER HEAT => a form of energy that can be transferred from one system to another.
CHAPTER 5 MESB 374 System Modeling and Analysis Thermal Systems
Heat Transfer Carlos Silva December 9 th Energy transference Energy can be transferred between a system and its surroundings Work Heat Mass flow.
One-Dimensional Steady-State Conduction
Chapter 1: Fourier Equation and Thermal Conductivity
Thermal Energy and Heat thermal energy the total kinetic and potential energy of the atoms or molecules of a substance heat the transfer of energy from.
MECH4450 Introduction to Finite Element Methods
INTRODUCTION TO CONVECTION
HEAT TRANSFER-CONDUCTION CONVECTION AND RADIATION.
Chapter 2: Heat Conduction Equation
Chapter 3 Part 2 One-Dimensional, Steady-State Conduction.
Chapter 2 Conduction Chapter 2.
HW/Tutorial # 1 WRF Chapters 14-15; WWWR Chapters ID Chapters 1-2
MECHANISM OF HEAT TRANSFER.  HEAT TRANSFER  Occurs only between regions that are at different temperature and its direction is always from higher to.
Heat Transfer Thermal energy Temperature is the average amount of energy of motion of each particle of a substance. Thermal energy is the total energy.
Heat Transfer: Physical process by which thermal energy is exchanged between material bodies or inside the same body as a result of a temperature difference.
Heat Transfer Introduction and Conduction. Conduction  If a temperature gradient exits in a continuous substance, heat can flow unaccompanied by any.
HW/Tutorial # 1 WRF Chapters 14-15; WWWR Chapters ID Chapters 1-2 Tutorial #1 WRF#14.12, WWWR #15.26, WRF#14.1, WWWR#15.2, WWWR#15.3, WRF#15.1, WWWR.
Winter/ IntroductionM. Shapiro 1 Can calculate Q 12 [J] from the first law of thermo. קצב מעבר חום heat transfer rate can’t calculate from thermo.
HEAT TRANSFER Problems with FEM solution
Chapter 16 Temperature and Heat.  Definition of heat: Heat is the energy transferred between objects because of a temperature difference.  Objects are.
Lesson 7: Thermal and Mechanical Element Math Models in Control Systems ET 438a Automatic Control Systems Technology 1lesson7et438a.pptx.
Radiation, Conduction, Convection
HW/Tutorial # 1 WRF Chapters 14-15; WWWR Chapters ID Chapters 1-2
Heat Energy.
MODUL KE SATU TEKNIK MESIN FAKULTAS TEKNOLOGI INDUSTRI
Building Energy Analysis
Temperature, Heat and Thermal Expansion
Introduction to Heat Transfer
UNIT - 4 HEAT TRANSFER.
Heat Transfer Ana Galvao, Julie Kessler, Luke O’Malley, Matteo Ricci & Jessica Young “L JJAM” aka “Dream Team” aka Team 3 CHBE446 02/02/18 Aka “Haha. A.
Fundamentals of Heat Transfer
Heat Transfer: Physical process by which thermal energy is exchanged between material bodies or inside the same body as a result of a temperature difference.
Heat Transfer Equations Based on the conservation equation Conservation of energy applies whether we are considering a whole plant, a single item.
Chapter 13 TRANSFER OF HEAT is minimized by multiple layers of beta cloth. These and other insulating materials protect spacecraft from hostile environmental.
Heat Transfer Coefficient
Energy Transfer Through Heat
What is Fin? Fin is an extended surface, added onto a surface of a structure to enhance the rate of heat transfer from the structure. Example: The fins.
Energy & Transformations
Steady-State Heat Transfer (Initial notes are designed by Dr
Exercises. Introduction to Fins
What are Fins ? Fins are extended surfaces used to increase the rate of heat transfer. It is made of highly conductive materials such as aluminum.
Heat.
Fundamentals of Heat Transfer
Heat Transfer: Physical process by which thermal energy is exchanged between material bodies or inside the same body as a result of a temperature difference.
5th Grade Vocabulary Part Five
Presentation transcript:

MECh300H Introduction to Finite Element Methods Finite Element Analysis (F.E.A.) of 1-D Problems – Heat Conduction

Heat Transfer Mechanisms Conduction – heat transfer by molecular agitation within a material without any motion of the material as a whole. Convection – heat transfer by motion of a fluid. Radiation – the exchange of thermal radiation between two or more bodies. Thermal radiation is the energy emitted from hot surfaces as electromagnetic waves.

Heat Conduction in 1-D Governing equation: Steady state equation: Heat flux q: heat transferred per unit area per unit time (W/m2) Governing equation: Q: heat generated per unit volume per unit time C: mass heat capacity k: thermal conductivity Steady state equation:

Thermal Convection Newton’s Law of Cooling

Thermal Conduction in 1-D Boundary conditions: Dirichlet BC: Natural BC: Mixed BC:

Weak Formulation of 1-D Heat Conduction (Steady State Analysis) Governing Equation of 1-D Heat Conduction ----- 0<x<L Weighted Integral Formulation ----- Weak Form from Integration-by-Parts -----

Formulation for 1-D Linear Element x1 x2 1 2 T1 x T2 f1 Let x2 x1 f1T1 f2T2

Formulation for 1-D Linear Element Let w(x)= fi (x), i = 1, 2

Element Equations of 1-D Linear Element x1 x2 1 2 T1 x T2 f1

1-D Heat Conduction - Example A composite wall consists of three materials, as shown in the figure below. The inside wall temperature is 200oC and the outside air temperature is 50oC with a convection coefficient of h = 10 W(m2.K). Find the temperature along the composite wall. t1 t2 t3 x

Thermal Conduction and Convection- Fin Objective: to enhance heat transfer Governing equation for 1-D heat transfer in thin fin w t x dx where

Fin - Weak Formulation (Steady State Analysis) Governing Equation of 1-D Heat Conduction ----- 0<x<L Weighted Integral Formulation ----- Weak Form from Integration-by-Parts -----

Formulation for 1-D Linear Element Let w(x)= fi (x), i = 1, 2

Element Equations of 1-D Linear Element x=0 x=L 1 2 T1 x T2 f1