Lecture

Mod-09 Lec-15 Drift Flux Model (Contd.)

This module dives deeper into the Drift Flux Model, expanding on its applications and theoretical underpinnings. Students will explore the mathematical foundations and practical implications of the model in multiphase flow scenarios. The session includes discussions on how the drift flux model can be applied to predict flow behavior in gas-liquid systems. Analytical techniques and computational methods used to solve drift flux equations are taught, ensuring students gain hands-on experience. The module concludes with case studies demonstrating real-world applications, helping students bridge theory with practice.


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

    This module introduces the concept of multiphase flow, covering its significance in various industries. Students will learn about:

    • Different types of multiphase flows.
    • Applications in process industries.
    • Common terminologies related to flow patterns.
    • Flow pattern maps and their importance.

    By the end of this module, learners will have a solid understanding of the foundational aspects of multiphase flow, setting the stage for more advanced topics.

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

    In this module, students will delve into the estimation of flow patterns in multiphase systems. Key topics include:

    1. Overview of various flow patterns in gas-liquid and solid-liquid interactions.
    2. Factors influencing the flow patterns.
    3. Methods for predicting flow patterns based on different conditions.

    Understanding these patterns is crucial for engineers working in the process industry, as it directly affects the efficiency of operations.

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

    This continuation of the previous module focuses on advanced estimation techniques for flow patterns. Students will explore:

    • Detailed analysis of flow pattern transitions.
    • Case studies to illustrate complex scenarios.
    • Practical applications of flow pattern estimation in industrial settings.

    By engaging with these advanced concepts, students will enhance their ability to predict flow behavior in varying conditions.

  • This module covers fascinating flow pattern maps, including Taylor bubbles. Key highlights include:

    1. Understanding Taylor bubble dynamics and their significance.
    2. Exploration of different flow regimes depicted in maps.
    3. Application of these maps in predicting flow behavior.

    Students will gain insight into how these visual tools aid in the analysis of multiphase flow in various systems.

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

    This module introduces essential definitions and common terminologies in multiphase flow. Students will learn about:

    • Key concepts underpinning multiphase flow.
    • Common terms used in the field.
    • The importance of precise terminology in engineering communication.

    A well-defined vocabulary is crucial for effective discussions and analyses in multiphase systems.

  • This module continues to elaborate on definitions and common terminologies in multiphase flow. Topics include:

    1. Advanced terms and their applications.
    2. Clarification of complex concepts.
    3. Importance of accuracy in terminology for effective engineering practice.

    Students will solidify their understanding of the language used in the multiphase flow community, preparing them for practical applications.

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

    In this module, students will explore simple analytical models used in the study of multiphase flow. Topics covered include:

    • Basic principles of analytical modeling.
    • Application of models to predict flow behavior.
    • Limitations and assumptions of various models.

    Understanding these models is essential for engineers developing solutions in multiphase flow environments.

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

    The module begins with an introduction to the concept of multiphase flow, highlighting its significance in various industrial applications. We will explore different types of multiphase flows and commonly used terminologies, as well as flow patterns and their corresponding maps.

    Key topics include:

    • Definition and importance of multiphase flow.
    • Types of multiphase flow including gas-liquid, solid-liquid, and gas-solid.
    • Flow pattern visualizations and their implications for engineering.
  • Mod-06 Lec-09 The Homogeneous Flow Theory (Contd.)
    Prof. P.K. Das, Prof. Gargi Das

    This module delves into one-dimensional steady homogeneous flow, providing a comprehensive understanding of its principles and applications. Students will learn about the assumptions made in this model and how it simplifies the analysis of multiphase systems.

    The following key aspects will be covered:

    • Definition and characteristics of homogeneous flow.
    • Analytical approaches for modeling one-dimensional flow.
    • Applications in engineering and process design.
  • Mod-07 Lec-10 Compressible Flow A Recapitulation
    Prof. P.K. Das, Prof. Gargi Das

    This module introduces the critical concept of choking in multiphase flow, detailing its implications for flow rate and system stability. Through theoretical derivations and practical examples, students will gain insights into how choking phenomena affect operational efficiency.

    Topics include:

    • Definition and significance of choking in flow systems.
    • Derivation of critical flow rate equations.
    • Real-world implications and applications.
  • This module covers the one-dimensional steady separated flow model, focusing on the dynamics of different phases within a multiphase system. Students will learn how to analyze flow when phases have different velocities and how phase changes affect the flow behavior.

    Key areas of focus include:

    • Understanding phase separation and velocity differences.
    • Analyzing flow with phase change phenomena.
    • Applications in real-world scenarios.
  • This module further explores the flow dynamics where inertia effects dominate. Students will analyze energy equations that govern these flows, gaining a deeper understanding of the forces at play in multiphase systems.

    Topics covered include:

    • Inertia effects and their significance in flow analysis.
    • Mathematical formulation of energy equations.
    • Real-life examples of dominant inertia flows.
  • Mod-09 Lec-13 Drift Flux Model
    Prof. P.K. Das, Prof. Gargi Das

    This module presents the separated flow model for stratified and annular flows. Students will learn the characteristics and behaviors of these flow types, including how they differ from other flow regimes.

    Key topics include:

    • Definition and characteristics of stratified and annular flows.
    • Mathematical modeling and analysis.
    • Applications in engineering and process design.
  • Mod-09 Lec-14 Drift Flux Model (Contd.)
    Prof. P.K. Das, Prof. Gargi Das

    This module introduces the general theory of the drift flux model, which is essential for understanding multiphase flow dynamics. Students will explore how this model can be applied to analyze bubbly and slug flow patterns, gaining insights into their behavior.

    Key areas of focus include:

    • Fundamentals of the drift flux model.
    • Applications to bubbly and slug flows.
    • Practical implications for engineering design.
  • Mod-09 Lec-15 Drift Flux Model (Contd.)
    Prof. P.K. Das, Prof. Gargi Das

    This module dives deeper into the Drift Flux Model, expanding on its applications and theoretical underpinnings. Students will explore the mathematical foundations and practical implications of the model in multiphase flow scenarios. The session includes discussions on how the drift flux model can be applied to predict flow behavior in gas-liquid systems. Analytical techniques and computational methods used to solve drift flux equations are taught, ensuring students gain hands-on experience. The module concludes with case studies demonstrating real-world applications, helping students bridge theory with practice.

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

    Continuing from the previous session, this module further elaborates on the Drift Flux Model, highlighting advanced concepts and their practical utilities. The focus is on solving complex flow problems using the model, with emphasis on accuracy and efficiency. Students will engage with interactive simulations to visualize the impact of different parameters on flow dynamics. The module also covers the limitations of the model and strategies to overcome these challenges. Discussions on contemporary research trends and developments in the field provide insights into future advancements.

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

    This module introduces the Separated Flow Model, a critical concept for understanding multiphase flow dynamics where phases move at different velocities. Students will learn to differentiate between homogeneous and separated flow models, and gain insights into the conditions under which each model is applicable. The module covers mathematical formulations and derivations, equipping students with the skills to analyze and predict flow behavior in industrial applications. Practical examples and problem sets are provided to reinforce learning and ensure a comprehensive grasp of the model.

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

    Building on the initial understanding of the Separated Flow Model, this module delves into more complex scenarios and applications. Students will explore various flow regimes, including stratified and annular flows, and understand how the separated flow model can be tailored to these situations. Emphasis is placed on the derivation of equations and the use of computational tools to validate theoretical predictions. By the end of the module, students will be adept at applying the separated flow model to a range of engineering challenges, backed by a solid foundation in its principles.

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

    This module continues the exploration of the Separated Flow Model, focusing on intricate details and advanced case studies. Students will investigate how the model adapts to different flow conditions and the impact of variables such as pressure and temperature. The session includes hands-on activities involving computational software to simulate flow scenarios and test hypotheses. This practical approach helps solidify theoretical knowledge and develop problem-solving skills essential for handling real-world multiphase flow systems.

  • In this module, the focus shifts to the condition of choking in the Separated Flow Model. Students will learn about the phenomenon of choking, its causes, and its effects on flow dynamics. Detailed discussions on critical flow rate and pressure differential are included. The module presents theoretical derivations and practical guidelines for predicting and managing choking in industrial settings. Students will also participate in laboratory experiments to observe choking phenomena, enhancing their understanding of the flow model’s limitations and capabilities.

  • This module continues the investigation into the condition of choking within the Separated Flow Model. Further insights into managing choking in complex systems are discussed. Students are introduced to advanced diagnostic tools used in industry to detect and mitigate choking. The module also covers the latest research and technological advancements aimed at improving flow efficiency and safety. By the end of the session, students will be equipped with comprehensive strategies to address choking in diverse engineering environments.

  • This module focuses on the separated flow model, which is crucial for analyzing multiphase flows. Students will learn the methodologies for estimating frictional pressure drops and void fractions in different flow conditions. Key aspects include:

    • Understanding the principles of the separated flow model.
    • Learning to estimate frictional pressure drops in both stratified and annular flows.
    • Exploring the theoretical background and practical applications of void fraction measurements.

    By the end of this module, participants will be equipped with the tools to effectively analyze and predict the behavior of multiphase systems.

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

    This module delves into the separated flow model, enhancing the understanding of flow dynamics in multiphase systems. It will cover:

    • Theoretical foundations of separated flow.
    • Application of mathematical models to practical scenarios.
    • Case studies illustrating the use of the separated flow model in real-world applications.

    Participants will gain insights into how different phases interact and the implications for system design and efficiency.

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

    This module offers an in-depth look at the separated flow model, focusing on theoretical and practical aspects. Key topics include:

    • Detailed analysis of flow separation and its implications.
    • Techniques for measuring and predicting phase interactions.
    • Evaluation of flow stability in multiphase systems.

    Students will learn to apply these concepts to real-life engineering challenges, enhancing their analytical skills.

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

    This module continues the exploration of the separated flow model, focusing on advanced applications and analyses. It covers:

    • In-depth study of flow characteristics in various regimes.
    • Practical examples of separated flow in industry.
    • Evaluation techniques for assessing flow model performance.

    Through practical exercises, students will enhance their ability to apply the separated flow model in real-world situations.

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

    This module provides a comprehensive analysis of specific flow regimes, essential for understanding multiphase flow systems. The content includes:

    • Identifying and analyzing different flow regimes.
    • Evaluating the impact of flow conditions on system performance.
    • Case studies of slug flow dynamics.

    Students will develop skills to analyze flow behavior under varying conditions, which is crucial for system optimization.

  • This module continues to explore specific flow regimes, with a focus on continuous learning and practical applications. Topics include:

    • Continuation of slug flow analysis.
    • Implications of flow regime transitions.
    • Real-world applications in process industries.

    Students will gain insights into how flow regime transitions affect system dynamics and stability.

  • This module focuses on the analysis of slug flow, providing a detailed understanding of this specific flow regime. Key points include:

    • Mechanics of slug flow and its characteristics.
    • Impact of slug flow on overall system performance.
    • Case studies demonstrating slug flow behavior in various systems.

    By examining real-life examples, students will learn to manage slug flow issues effectively in their engineering practices.

  • This module provides an introduction to boiling heat transfer in two-phase flow with a focus on phase change phenomena. It covers:

    • The fundamentals of boiling heat transfer and its importance in multiphase systems.
    • The mechanisms of phase change and their effects on flow characteristics.
    • Real-world applications where boiling heat transfer is critical.
    • Key concepts such as nucleation, bubble dynamics, and heat transfer coefficients.

    Students will gain insights into the challenges and methods for optimizing heat transfer in boiling processes, setting the stage for advanced topics in multiphase flow.

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

    This module delves into the concept of bubble growth within multiphase flow systems. It discusses:

    • The physical principles governing bubble formation and growth.
    • The impact of temperature and pressure on bubble dynamics.
    • Applications of bubble growth in various industrial processes.
    • Analysis of the effects of different fluids and conditions on growth rates.

    Through theoretical and practical examples, students will understand how bubble dynamics influence overall system performance in multiphase flows.

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

    This module focuses on different types of nucleation in boiling processes. Key topics include:

    • Definitions and classifications of nucleation types: homogeneous and heterogeneous.
    • Factors influencing nucleation site selection and growth rate.
    • Comparative analysis of nucleation mechanisms in various fluids.
    • Implications of nucleation on heat transfer efficiency and system stability.

    Students will engage in case studies to evaluate the significance of nucleation in improving thermal performance in industrial applications.

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

    This module examines the phenomenon of ebullition from hot surfaces, discussing the following key points:

    • Understanding the mechanisms of ebullition and its relevance in thermal systems.
    • Factors affecting bubble release from heated surfaces.
    • Conditions leading to different ebullition regimes.
    • Practical implications for heat exchangers and boiling systems in industry.

    Through simulations and experiments, students will observe the dynamics of ebullition and its effect on overall heat transfer efficiency.

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

    This module covers the cycle of bubble growth and departure in boiling processes. It emphasizes:

    • The life cycle of a bubble from nucleation to departure.
    • Factors influencing bubble growth rates and exit dynamics.
    • The relationship between bubble behavior and heat transfer performance.
    • Experimental methods to visualize and measure bubble dynamics.

    Students will analyze the impact of bubble behavior on overall system efficiency and explore strategies for optimizing boiling heat transfer.

  • This module analyzes heat transfer in different regimes of boiling. Key topics include:

    • Understanding various boiling regimes: nucleate, film, and transition boiling.
    • Factors influencing heat transfer rates in each regime.
    • Practical applications of boiling regimes in industrial processes.
    • Methods to enhance heat transfer efficiency across different regimes.

    Students will gain insights into how different boiling regimes affect thermal performance and learn approaches to optimize heat transfer in real-world applications.

  • This module continues exploring heat transfer in different regimes of boiling, focusing on:

    • Advanced concepts in heat transfer mechanisms in boiling.
    • Comparative analysis of heat transfer coefficients across regimes.
    • Case studies showcasing innovative solutions to enhance boiling heat transfer.
    • Future trends and research directions in boiling heat transfer technology.

    Students will deepen their understanding of heat transfer in boiling and discuss cutting-edge advancements aimed at improving energy efficiency.

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

    This module focuses on the critical heat flux in multiphase flows, particularly in relation to film boiling phenomena. Understanding critical heat flux is essential for ensuring safety and efficiency in thermal systems.

    Key topics covered in this module include:

    • Defining critical heat flux and its significance in multiphase systems.
    • Mechanisms of film boiling and its impact on heat transfer rates.
    • Factors influencing critical heat flux, including fluid properties and flow conditions.
    • Analytical and empirical models for predicting critical heat flux.
    • Applications in various industries, including power generation and chemical processing.
  • This module delves into the measurement techniques used for assessing two-phase flow parameters. Accurate measurement is crucial for modeling and managing processes in multiphase systems.

    Topics include:

    • Overview of two-phase flow characteristics.
    • Measurement devices and their applications.
    • Techniques for measuring pressure drop, void fraction, and flow rates.
    • Flow regime identification methodologies.
    • Challenges and solutions in measuring multiphase flows.
  • This module focuses on void fraction measurement techniques in two-phase flows, a critical parameter affecting flow dynamics and phase distribution.

    Key areas of study include:

    • Understanding the concept of void fraction and its importance in multiphase flow.
    • Methods for measuring void fraction, including techniques such as gamma densitometry and capacitance.
    • Factors influencing void fraction measurements.
    • Comparison of various measurement techniques and their applicability.
    • Practical applications in industries such as oil and gas, chemical manufacturing, and food processing.
  • This module continues the discussion on measurement techniques for two-phase flow parameters, presenting advanced methodologies for accurate flow assessments.

    Topics include:

    • Advanced flow measurement technologies.
    • Integration of measurement data for comprehensive flow analysis.
    • Calibration techniques for ensuring measurement accuracy.
    • Assessment of measurement uncertainty and error analysis.
    • Case studies demonstrating real-world applications of these techniques.
  • This module addresses the estimation of flow patterns in two-phase flows, which is essential for understanding flow behavior and optimizing system performance.

    Key aspects covered include:

    • Identification of common flow patterns in multiphase systems.
    • Techniques for predicting flow patterns based on flow conditions.
    • Influence of flow patterns on pressure drop and phase distribution.
    • Tools and software for flow pattern visualization and analysis.
    • Case studies showcasing the impact of flow patterns on system efficiency.