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1 1 Introduction Introduction to Maple Getting Started with Maple Plotting with Maple Solving Linear and Nonlinear Equations Matrix Operations Differential Equations Laplace Transformations Do Loop While Loop Write Data Out Example Reading in Data from a Text File Summary Problems 24 References 27 2 Initial Value Problems Linear Ordinary Differential Equations Introduction Homogeneous Linear ODEs First Order Irreversible Series Reactions 31 Example 2.1. Irreversible Series Reactions (see equations (2.8)) First Order Reversible Series Reactions 37 Example 2.2. Reversible Series Reactions (see equations (2.10)) Nonhomogeneous Linear ODEs 47 Example 2.3. Heating of Fluid in a Series of Tanks 49 Example 2.4. Time Varying Input to a CSTR with a Series Reaction Higher Order Linear Ordinary Differential Equations 63 Bibliografische Informationen digitalisiert durch

2 VIII Contents Example 2.5 A Second Order ODE Solving Systems of ODEs Using the Laplace Transform Method 72 Example 2.6. Laplace Solution of Example 2.1 Equations 73 Example 2.7. Laplace Solution for Second Order System with Dirac forcing Function Solving Linear ODEs Using Maple's 'dsolve' Command 80 Example 2.8. Solving Linear ODEs Using Maple 80 Example 2.9. Heat Transfer in a Series of Tanks, 'dsolve' Summary Problems Nonlinear Ordinary Differential Equations Introduction 87 Example Simultaneous Series Reactions Solving Nonlinear ODEs Using Maple's 'dsolve' Command Series Solutions for Nonlinear ODEs 98 Example Fermentation Kinetics 99 Example Stop Conditions 103 Example Stop Conditions Stiff ODEs 107 Example Stiff Ordinary Differential Equations Differential Algebraic Equations 112 Example Differential Algebraic Equations Multiple Steady States 116 Example Multiple Steady States Steady State Solutions 124 Example Steady State Solutions 124 Example Phase Plane Analysis Summary Problems 149 Appendix A: Matrix Exponential Method 155 Appendix B: Matrix Exponential by the Laplace Transform Method 161 References Boundary Value Problems Linear Boundary Value Problems Introduction Exponential Matrix Method for Linear Boundary Value Problems 169 Example Example Exponential Matrix Method for Linear BVPs with Semi-infinite Domains 180

3 DC Example Use of Matrizant in Solving Boundary Value Problems 184 Example Example Example Symbolic Finite Difference Solutions for Linear Boundary Value Problems 195 Example Example 3.8. Cylindrical Catalyst Pellet Solving Linear Boundary Value Problems Using Maple's 'dsolve'command 208 Example 3.9. Heat Transfer in a Fin 208 Example Cylindrical Catalyst Pellet 209 Example Spherical Catalyst Pellet Summary Exercise Problems Nonlinear Boundary Value Problems Introduction Series Solutions for Nonlinear Boundary Value Problems 218 Example Series Solutions for Diffusion with a Second Order Reaction 218 Example Series Solutions for Non-isothermal Catalyst Pellet - Multiple Steady States Finite Difference Solutions for Nonlinear Boundary Value Problems 229 Example Diffusion with a Second Order Reaction Shooting Technique for Boundary Value Problem 233 Example Nonlinear Heat Transfer 233 Example Multiple Steady States in a Catalyst Pellet Numerical Solution for Boundary Value Problems Using Maple's 'dsolve' Command 244 Example Diffusion with Second Order Reaction 245 Example Heat Transfer with Nonlinear Radiation Boundary Conditions 247 Example Diffusion of a Substrate in an Enzyme Catalyzed Reaction - BVPs with Removable Singularity 250 Example Multiple Steady States in a Catalyst Pellet 253 Example Blasius Equation - Infinite Domains Numerical Solution for Coupled BVPs Using Maple's 'dsolve' Command 259 Example Axial Conduction and Diffusion in a Tubular Reactor Solving Boundary Value Problems and Initial Value Problems 262 Example Diffusion with a Second Order Reaction 262

4 X Contents Multiple Steady States 266 Example Multiple Steady States in a Catalyst Pellet - ri vs. O Eigenvalue Problems 272 Example Graetz Problem-Finite Difference Solution 272 Example Graetz Problem-Shooting Technique Summary Exercise Problems 288 References Partial Differential Equations in Semi-infinite Domains Partial Differential Equations (PDEs) in Semi-infinite Domains Laplace Transform Technique for Parabolic PDEs 295 Example 4.1. Heat Conduction in a Rectangular Slab 296 Example 4.2. Heat Conduction with Transient Boundary Conditions 301 Example 4.3. Heat Conduction with Flux Boundary Conditions 305 Example 4.4. Heat Conduction with an Initial Profile 308 Example 4.5. Heat Conduction with a Source Term Laplace Transform Technique for Parabolic PDEs - Advanced Problems 314 Example 4.6. Heat Conduction with Radiation at the Surface 314 Example 4.7. Unsteady State Diffusion with a First-Order Reaction Similarity Solution Technique for Parabolic PDEs 324 Example 4.8. Heat Conduction in a Rectangular Slab 325 Example 4.9. Laminar Flow in a CVD Reactor Similarity Solution Technique for Elliptic Partial Differential Equations 333 Example Steady State Heat Conduction in a Plate 333 Example Current Distribution in an Electrochemical Cell Similarity Solution Technique for Nonlinear Partial Differential Equations 339 Example Variable Diffusivity 340 Example Plane Flow Past a Flat Plate - Blassius Equation Summary Exercise Problems 348 References Method of Lines for Parabolic Partial Differential Equations Semianalytical Method for Parabolic Partial Differential Equations (PDEs) Introduction Semianalytical Method for Homogeneous PDEs 353 Example 5.1. Heat Conduction in a Rectangular Slab 356

5 XI Semianalytical Method for Nonhomogeneous PDEs 365 Example Example Example Example Example 5.6. Semianalytical Method for the Graetz Problem 401 Example 5.7. Semianalytical Method for PDEs with Known Initial Profiles Semianalytical Method for PDEs in Composite Domains 425 Example Expediting the Calculation of Exponential Matrix 437 Example Example Example Summary Exercise Problems Numerical Method of Lines for Parabolic Partial Differential Equations (PDEs) Introduction Numerical Method of Lines for Parabolic PDEs with Linear 456 Example Diffusion with Second Order Reaction 458 Example Variable Diffusivity Numerical Method of Lines for Parabolic PDEs with Nonlinear Boundary 469 Example Nonlinear Radiation at the Surface Numerical Method of Lines for Stiff Nonlinear PDEs 474 Example Exothermal Reaction in a Sphere Numerical Method of Lines for Nonlinear Coupled PDEs 480 Example Two Coupled PDEs Numerical Method of Lines for Moving Boundary Problems 491 Example The Shrinking Core Model for Catalyst Regeneration Summary Exercise Problems 502 References Method of Lines for Elliptic Partial Differential Equations Semianalytical and Numerical Method of Lines for Elliptic PDEs Introduction Semianalytical Method for Elliptic PDEs in Rectangular Coordinates 507 Example 6.1. Heat Transfer in a Rectangle 508 Example

6 XII Contents Semianalytical Method for Elliptic PDEs in Cylindrical Coordinates - Graetz Problem 536 Example 6.3. Graetz Problem with a Fixed Wall Temperature Semianalytical Method for Elliptic PDEs with Nonlinear Boundary Conditions 547 Example 6.4. Nonlinear Radiation Boundary Condition Semianalytical Method for Elliptic PDEs with Irregular Shapes 556 Example 6.5. Potential Distribution in a Hull Cell Numerical Method of Lines for Elliptic PDEs in Rectangular Coordinates 564 Example 6.6. Numerical Solution for Heat Transfer in a Rectangle 565 Example 6.7. Numerical Solution for Heat Transfer for Nonlinear Elliptic PDEs Summary 581 References Partial Differential Equations in Finite Domains Separation of Variables Method for Partial Differential Equations (PDEs) in Finite Domains Introduction Separation of Variables for Parabolic PDEs with Homogeneous Boundary Conditions 587 Example 7.1. Heat Conduction in a Rectangle 587 Example 7.2. Heat Conduction with an Insulator Boundary Condition 599 Example 7.3. Mass Transfer in a Spherical Pellet Separation of Variables for Parabolic PDEs with an Initial Profile 609 Example 7.4. Heat Conduction in a rectangle with an Initial Profile 609 Example 7.5. Heat Conduction in a Slab with a Linear Initial Profile Separation of Variables for Parabolic PDEs with Eigenvalues Governed by Transcendental Equations 618 Example 7.6. Heat Conduction in a Slab with Radiation Boundary Conditions Separation of Variables for Parabolic PDEs with Nonhomogeneous Boundary Conditions 623 Example 7.7. Heat Conduction in a slab with Nonhomogeneous Boundary Conditions 623 Example 7.8. Diffusion with Reaction Separation of Variables for Parabolic PDEs with Two Flux Boundary Conditions 635

7 XIII Example 7.9. Diffusion in a Slab with Nonhomogeneous Flux Boundary Conditions Numerical Separation of Variables for Parabolic PDEs 643 Example Heat Transfer in a Rectangle Separation of Variables for Elliptic PDEs 649 Example Heat Transfer in a Rectangle 649 Example Diffusion in a Cylinder 655 Example Heat Transfer with Nonhomogeneous Boundary Conditions 660 Example Heat Transfer with a Nonhomogeneous Governing Equation Summary Exercise Problems 672 References Laplace Transform Technique for Partial Differential Equations Laplace Transform Technique for Partial Differential Equations (PDEs) in Finite Domains Introduction Laplace Transform Technique for Hyperbolic PDEs 679 Example 8.1. Wave Propagation in a Rectangle 679 Example 8.2. Wave Propagation in a Rectangle Laplace Transform Technique for Parabolic Partial Differential Equations - Simple Solutions 685 Example 8.3. Heat Transfer in a Rectangle 685 Example 8.4. Transient Heat Transfer in a Rectangle Laplace Transform Technique for Parabolic Partial Differential Equations - Short Time Solution 690 Example 8.5. Heat Transfer in a Rectangle 691 Example 8.6. Mass Transfer in a Spherical Pellet Laplace Transform Technique for Parabolic Partial Differential Equations - Long Time Solution 701 Example 8.7. Heat Conduction with an Insulator Boundary Condition 703 Example 8.8. Diffusion with Reaction 709 Example 8.9. Heat Conduction with Time Dependent Boundary Conditions Laplace Transform Technique for Parabolic Partial Differential Equations - Heaviside Expansion Theorem tor Multiple Roots 719 Example Heat Transfer in a Rectangle 720 Example Diffusion in a Slab with Nonhomogeneous Flux Boundary Conditions during Charging of a Batten' 725 Example Distribution of Overpotential in a Porous Electrode 729

8 XIV Contents Example Heat Conduction in a Slab with Radiation Boundary Conditions Laplace Transform Technique for Parabolic Partial Differential Equations in Cylindrical Coordinates 742 Example Heat Conduction in a Cylinder Laplace Transform Technique for Parabolic Partial Differential Equations for Time Dependent Boundary Conditions - Use of Convolution Theorem 747 Example Heat Conduction in a Rectangle with a Time Dependent Boundary Condition Summary Exercise Problems 755 References Parameter Estimation Introduction Least Squares Method Summation Form or Classical Form Confidence Intervals: Classical Approach Prediction of New Observations A One Parameter through the Origin Model Nonlinear Least Squares 778 Example 9.1. Parameter Estimation Hessian Matrix Approach Confidence Intervals Sensitivity Coefficient Equations One Parameter Model Two Parameter Model Exercise Problems 819 References Miscellaneous Topics Miscellaneous Topics on Numerical Methods Introduction Iterative Finite Difference Solution for Boundary Value Problems 821 Example Diffusion with a Second Order Reaction 821 Example Nonisothermal Reaction in a Catalyst Pellet - Multiple Steady States Finite Difference Solution for Elliptic PDEs 827 Example Heat Transfer in a Rectangle 827 Example Heat Transfer in a Cylinder Iterative Finite Difference Solution for Elliptic PDEs 833 Example Heat Transfer in a Rectangle - Nonlinear Elliptic PDE 833

9 XV Numerical Method of Lines for First Order Hyperbolic PDEs 838 Example Wave Propagation in a Rectangle with Consistent Initial/Boundary Conditions 839 Example Wave Propagation in a Rectangle with inconsistent Initial/Boundary Conditions Numerical Method of Lines for Second Order Hyperbolic PDEs 848 Example Wave Equation with Consistent Initial/Boundary Conditions 848 Example Wave Equation with Inconsistent Initial/Boundary Conditions Summary Exercise Problems 855 References 856 Subject Index 857

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