Learn · NPTEL

Course10310500260 lectures

Introduction to Scaling Analysis and Perturbation Methods for Chemical Engineers

Prof. Sourav Sengupta · IIT-ISM Dhanbad

Start with lecture 1 At NPTEL

About

The course “Introduction to scaling analysis and perturbation methods for chemical engineers” is intended to equip the learners with a host of tools from applied mathematics, that are critical towards modelling and simulating a range of scenarios in chemical engineering (science and engineering in general), especially towards scale-up and optimization, by suitable simplification and subsequent approximate solution of complex multiphysics governing equations. Being a graduate-level elective course, the focus is on understanding and employing approximate methods such as scaling and asymptotics. Specifically, the students will

learn the building blocks of modelling a process, i.e., formulating physicochemical processes.

learn about the importance and utility of scaling analysis.

get introduced to perturbation and asymptotic methods.

learn how to use aforementioned methods for solving engineering problems of interest (mainly from transport and reaction processes).

Intended audience: Senior undergraduates, postgraduates, PhD and postdoctoral candidates, and faculty members from Chemical Engineering, Mechanical Engineering, Biochemical Engineering, Biomedical Engineering, Physics/Applied Mathematics, etc., as well as industry professionals employed in process industries in consulting/design/simulation/R&D roles.

Prerequisites: Basic Engineering MathematicsFluid MechanicsTransport PhenomenaChemical Reaction Engineering

Lectures

Week 1:

  1. Lecture 01 : What is Mathematical Modelling? Definition, Philosophy and Procedure YouTube
  2. Lecture 02 : Motivation for modelling in Chemical Engineering: Case study from Nature and Industry YouTube
  3. Lecture 03 : Classification of Mathematical Models YouTube
  4. Lecture 04 : Types of Mathematical Models: Finite, Fuzzy, Statistical, Difference and differential equations, stochastic YouTube
  5. Lecture 05 : Building Blocks of Mathematical Model - Postulates, assumptions, equations, closure conditions YouTube

Week 2:

  1. Lecture 06 : What is Scaling Analysis? YouTube
  2. Lecture 07 : Motivation I : Simplification and Design of Experiments YouTube
  3. Lecture 08 : Motivation II : Perturbation Methods and Numerics YouTube
  4. Lecture 09 : Mathematical Basis of Scaling Analysis : Lie Group Theory YouTube
  5. Lecture 10 : Worked Example : Putting it all together YouTube

Week 3 :

  1. Lecture 11: The Eight-Step o(1) Procedure: Steps 1-3 & Interpretation YouTube
  2. Lecture 12 : The Eight-Step o(1) Procedure: Steps 4-8 & Interpretation YouTube
  3. Lecture 13 : Scaling as an alternative to Dimensional Analysis (Motivation & Brief introduction to the 11 -step Procedure) YouTube
  4. Lecture 14 : Scaling as an alternative to Dimensional Analysis: The 11 -step Procedure (Steps 1-8 & Interpretation) YouTube
  5. Lecture 15 : Scaling as an alternative to Dimensional Analysis: The 11 -step Procedure (Steps 9-11 & Interpretation) YouTube

Week 4 :

  1. Lecture 16 : Motivation & Advantages/Limitations, Non-dimensionalisation, and Example Problems YouTube
  2. Lecture 17 : Expansions (Binomial & Taylor), Gauge Functions YouTube
  3. Lecture 18 : Order Symbols (O,o), Asymptotic Sequence and Expressions YouTube
  4. Lecture 19 : Uniform vs. Nonuniform Expansions, Parameter Perturbation, Coordinate Perturbation YouTube
  5. Lecture 20 : Regular vs. Singular Perturbation, Week 4 Review YouTube

Week 5:

  1. Lecture 21 : Method of matched asymptotic expansions: Historical Introduction, and building the Outer Expansion YouTube
  2. Lecture 22 : Method of matched asymptotic expansions: The Inner Expansion, Matching, and the Composite Solution YouTube
  3. Lecture 23 : Overlap region, higher order composite solution, and Van Dyke’s matching principle YouTube
  4. Lecture 24 : Solving Coupled Equations I: Fast/Slow Systems in Theory YouTube
  5. Lecture 25 : Solving Coupled Equations II: A Complete Reactor Example, Week 5 Review YouTube

Week 6:

  1. Lecture 26 : Method of Strained Coordinates: The idea, and the principle YouTube
  2. Lecture 27 : The Method of strained parameters (Lindstedt - Poincare) YouTube
  3. Lecture 28 : The Method of strained coordinates(Lighthill's technique) YouTube
  4. Lecture 29 : Comparison between strained co-ordinates and matched asymptotic expansions YouTube
  5. Lecture 30 : Limitation of the Method of Strained Coordinates, Week 6 Review YouTube

Week 7:

  1. Lecture 31 : Why Method of Multiple Scales? The Derivative-Expansion Method YouTube
  2. Lecture 32 : The Two-Variable Expansion Procedure YouTube
  3. Lecture 33 : The Generalised Method of Nonlinear Scales YouTube
  4. Lecture 34 : The WKB Method-General Theory and Example YouTube
  5. Lecture 35 : Limitations of the three variants of Multiple-Scale Methods; Week 7 Summary YouTube

Week 8:

  1. Lecture 36 : Applying o(1) scaling: Fully Developed Laminar Flow between parallel plates YouTube
  2. Lecture 37 : Flow in a Wavy-Wall Channel: The Domain Perturbation Method (Flow Parallel to the Corrugation Grooves) YouTube
  3. Lecture 38 : Flow in a Wavy-Wall Channel - The Domain Perturbation Method (Flow Perpendicular to the Corrugation Grooves) YouTube
  4. Lecture 39 : Cross-Flow Filtration: Exact solution and regular perturbation solution YouTube
  5. Lecture 40 : Cross-Flow Filtration: Singular perturbation solution, and Summary of Week 8 YouTube

Week 9:

  1. Lecture 41 : Applying o(1) scaling: Unsteady-state, one-dimensional heat conduction YouTube
  2. Lecture 42 : A Heated Wire with Temperature-Dependent Properties: Regular Perturbation Solution YouTube
  3. Lecture 43 : A Thin Fin with Uniform Base Temperature Losing Heat to the Surrounding Air YouTube
  4. Lecture 44 : Fin with Non-Uniform Base Temperature: Singular Perturbation Solution (Outer Solution) YouTube
  5. Lecture 45 : Fin with Non-Uniform Base Temperature: Singular Perturbation (Inner Solution, Matching, and Composite Solution) YouTube

Week 10:

  1. Lecture 46 : Applying o(1) scaling : Large Pe Approximation for Mass Transfer in Falling Film Flow YouTube
  2. Lecture 47 : Applying o(1) scaling : Large Pe Approximation for Mass Transfer in Falling Film Flow(Contd.) YouTube
  3. Lecture 48 : Large Pe Approximation for Mass Transfer in Falling Film Flow: Matched Asymptotic Expansions Part 1 - The Outer Solution and the Failing of a Regular Expansion YouTube
  4. Lecture 49 : Large Pe Approximation for Mass Transfer in Falling Film Flow: Matched Asymptotic Expansions Part 2 - The Inner Region Leading Order Solution YouTube
  5. Lecture 50 : Large Pe Approximation for Mass Transfer in Falling Film Flow: Matched Asymptotic Expansions Part 3 - Assembling the Composite Solution and Summary of Week 10 YouTube

Week 11:

  1. Lecture 51 : Applying O(1) scaling: Microscale modelling of Chemisorption process YouTube
  2. Lecture 52 : Applying O(1) scaling: Microscale modelling of Chemisorption process (Contd…) YouTube
  3. Lecture 53 : Reaction with an Immobile Substrate: Regular Perturbation Analysis YouTube
  4. Lecture 54 : The Quasi-Steady-State Approximation (QSSA) Part I: Singular Perturbation and the Need for Matched Asymptotics YouTube
  5. Lecture 55 : Beyond Quasi-Steady-State Approximation Part II: Inner Solution and Composite Solution YouTube

Week 12:

  1. Lecture 56 : Applying o(1) scaling : Flow Reactor for Hydrogen production from Methane YouTube
  2. Lecture 57 : Applying o(1) scaling : Flow Reactor for Hydrogen production from Methane(Contd.) YouTube
  3. Lecture 58 : Applying O(1) scaling: Flow Reactor for Hydrogen production from Methane (Contd…) YouTube
  4. Lecture 59 : Catalyst Slab Part 1 - Small Thiele Modulus YouTube
  5. Lecture 60 : Catalyst Slab Part II – Large Thiele Modulus, Summary of Week 12 & this Course YouTube

Syllabus and materials

At NPTEL, as the course publishes them.

Credits and licence

Institution
IIT-ISM Dhanbad
Department
Chemical Engineering
Teacher
Prof. Sourav Sengupta
Level
Undergraduate
Language
English
Subjects
Chemistry, Engineering
Source
NPTEL
Licence
CC BY-NC-SA, as NPTEL states it. Non-commercial use only. NPTEL's terms
Attribution
NPTEL states: "Distributed under Creative Commons Attribution-ShareAlike / CC BY - NC - SA", beside a BY-NC-SA badge. Coordinated by IIT Kharagpur.
Who can watch
NPTEL gives no rating. Invisible Network shows it to Tweens profiles and older, judged from what the source says about it. How courses are placed