Course

Multiphase Flow

Indian Institute of Technology Kharagpur

This course introduces the fundamental concepts, principles and application of multiphase flow. The course opens with real life examples of such flow and its importance in process industries.

In connection with gas-liquid two phase flow, different flow regimes and flow regime maps are discussed. Next, various analytical models are introduced to understand the hydrodynamics of different flow regimes.

The phenomenon of choking is explained and relevant formulations are derived. The concept of bubble formation and bubble dynamics are presented.

The important aspects of hydrodynamics of solid-liquid and gas-solid flows are also discussed. Hydrodynamics of three phase flows are analyzed and compared with two phase flow situations.

Lastly various measurement techniques used for measuring pressure drop, void fraction and identification of flow patterns are introduced.

Course contents:

Definition of multiphase flow, flow patterns, one dimensional steady homogenous equilibrium flow, one dimensional steady separated flow model, choking and critical flow rate. General theory of drift flux model, Bubble formation and bubble dynamics, hydrodynamics of solid-liquid and gas-solid flow, hydrodynamics of three phase gas-liquid-liquid flows, Measurement techniques in multiphase flow.

Course topics:

Introduction to multiphase flow, types and applications, Common terminologies, flow patterns and flow pattern maps.
One dimensional steady homogenous flow.
Concept of choking and critical flow phenomena.
One dimensional steady separated flow model.
1. Phases are considered together but their velocities differ.
2. Phases are considered separately, flow with phase change.
Flow in which inertia effects dominate, energy equations.
The separated flow model for stratified and annular flow.
General theory of drift flux model.
Application of drift flux model to bubbly and slug flow.
Hydrodynamics of solid-liquid and gas-solid flow.
1. Principles of hydraulic and pneumatic transportation.
An introduction to three phase flow.
Measurement techniques for multiphase flow.
1. Flow regime identification, pressure drop, void fraction and flow rate measurement.

Course Lectures

Mod-01 Lec-01 Introduction
Prof. P.K. Das, Prof. Gargi Das

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Mod-02 Lec-02 Estimation of Flow Patterns
Prof. P.K. Das, Prof. Gargi Das

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Mod-02 Lec-03 Estimation of Flow Patterns (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-03 Lec-04 Flow Pattern Maps Fascinating Taylor Bubbles
Prof. P.K. Das, Prof. Gargi Das

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Mod-04 Lec-05 Definitions and Common Terminologies
Prof. P.K. Das, Prof. Gargi Das

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Mod-04 Lec-06 Definitions and Common Terminologies (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-05 Lec-07 Simple Analytical Models
Prof. P.K. Das, Prof. Gargi Das

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Mod-06 Lec-08 The Homogeneous Flow Theory
Prof. P.K. Das, Prof. Gargi Das

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Mod-06 Lec-09 The Homogeneous Flow Theory (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-07 Lec-10 Compressible Flow A Recapitulation
Prof. P.K. Das, Prof. Gargi Das

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Mod-07 Lec-11 Compressible Flow A Recapitulation (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-08 Lec-12 Choked Flow Condition for Homogeneous Flow
Prof. P.K. Das, Prof. Gargi Das

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Mod-09 Lec-13 Drift Flux Model
Prof. P.K. Das, Prof. Gargi Das

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Mod-09 Lec-14 Drift Flux Model (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-09 Lec-15 Drift Flux Model (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-09 Lec-16 Drift Flux Model ( Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-10 Lec-17 Separated Flow Model
Prof. P.K. Das, Prof. Gargi Das

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Mod-10 Lec-18 Separated Flow Model (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-10 Lec-19 Separated Flow Model ( Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-11 Lec-20 Separated Flow Model - Condition of Choking
Prof. P.K. Das, Prof. Gargi Das

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Mod-11 Lec-21 Separated Flow Model - Condition of Choking (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-12 Lec-22 Separated Flow Model - Estimation of Frictional Pressure Drop and Void Fraction
Prof. P.K. Das, Prof. Gargi Das

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Mod-12 Lec-23 Separated Flow Model
Prof. P.K. Das, Prof. Gargi Das

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Mod-12 Lec-24 Separated Flow Model
Prof. P.K. Das, Prof. Gargi Das

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Mod-12 Lec-25 Separated Flow Model
Prof. P.K. Das, Prof. Gargi Das

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Mod-13 Lec-26 Analysis of Specific Flow Regimes
Prof. P.K. Das, Prof. Gargi Das

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Mod-13 Lec-27 Analysis of Specific Flow Regimes (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-13 Lec-28 Analysis of Specific Flow Regimes - Slug Flow (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-14 Lec-29 Two Phase Flow with Phase Change - An Introduction to Boiling Heat Transfer
Prof. P.K. Das, Prof. Gargi Das

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Mod-15 Lec-30 Bubble Growth
Prof. P.K. Das, Prof. Gargi Das

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Mod-16 Lec-31 Different Types of Nucleation
Prof. P.K. Das, Prof. Gargi Das

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Mod-17 Lec-32 Ibullition from Hot Surfaces
Prof. P.K. Das, Prof. Gargi Das

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Mod-18 Lec-33 Cycle of Bubble Growth and Departure
Prof. P.K. Das, Prof. Gargi Das

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Mod-19 Lec-34 Heat Transfer in Different Regimes of Boiling
Prof. P.K. Das, Prof. Gargi Das

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Mod-19 Lec-35 Heat Transfer in Different Regimes of Boiling (Contd.)
Prof. P.K. Das, Prof. Gargi Das

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Mod-20 Lec-36 Critical Heat Flux , Film Boiling
Prof. P.K. Das, Prof. Gargi Das

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Mod-21 Lec-37 Measurement Techniques for Two Phase flow Parameters
Prof. P.K. Das, Prof. Gargi Das

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Mod-22 Lec-38 Measurement Techniques for Two Phase flow Parameters - Void Fraction Measurement
Prof. P.K. Das, Prof. Gargi Das

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Mod-22 Lec-39 Measurement Techniques for Two Phase flow Parameters
Prof. P.K. Das, Prof. Gargi Das

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Mod-23 Lec-40 Measurement Techniques for Two - Phase Flow Parameters - Estimation of Flow Patterns
Prof. P.K. Das, Prof. Gargi Das

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