Multiphase Flows

By Prof. Rajesh Kumar Upadhyay   |   IIT(BHU) Varanasi
Learners enrolled: 200
Multiphase flow reactors are critically important many industries like, chemical, petroleum, petrochemicals, food, pharmaceuticals etc. The performances of these reactors largely depend on the interactions of different phases involved. In this course basic of Multiphase flow along with different flow regime map and pressure drop, and volume fraction calculation will be covered. Further, the interaction between different phases at different scales will be discussed. Modelling methods used for multiphase flow reactors will be covered. Finally, different type of multiphase flow reactors will be introduced and their functioning, advantage and disadvantages and challenges along with future direction of research will be discussed.

INTENDED AUDIENCE :Under graduate and post graduate students, professional practitioner in the discipline of Chemical Engineering, Petroleum Engineering, Mechanical Engineering and Energy.
Course Status : Completed
Course Type : Elective
Duration : 8 weeks
Category :
  • Chemical Engineering
Credit Points : 2
Level : Undergraduate/Postgraduate
Start Date : 24 Jan 2022
End Date : 18 Mar 2022
Enrollment Ends : 07 Feb 2022
Exam Date : 27 Mar 2022 IST

Note: This exam date is subjected to change based on seat availability. You can check final exam date on your hall ticket.

Page Visits

Course layout

Week - 1 Multiphase flow introduction, Fundamental definitions and terminology used
Week - 2 Flow-pattern map for fluid-fluid (gas-liquid and liquid-liquid) and flow regime map for fluid-solids flows
Week - 3 Pressure drop and Volume fraction calculation for Homogeneous regimes: Using momentum balance equation from equation of motion and empirical correlations
Week - 4 Pressure drop and Volume fraction calculation for Segregated/Separated regimes: Using equation of motion and empirical correlations.
Week - 5 Multiphase Interactions: Drag, lift, virtual mass force, Basset force, one way, two way, three-way and four-way coupling and mathematical formulation of the same.
Week - 6 Modelling Methods for Multiphase Flows: Mixture Model, Euler-Euler Model and Euler-Lagrangian Model
Week - 7 Measurement Techniques used in Multiphase Flows
Week - 8
 Multiphase Reactors:  Bubble Column, Packed Bed ,Fluidized Bed 

Books and references

  • C.T. Crowe, Multiphase Flow Handbook, CRC Press, 2005.
  • C. E. Brennen, Fundamentals of multiphase flow, Cambridge University Press, 2005.
  • N.I. Kolev, Multiphase Flow Dynamics 1: Fundamentals, Springer, 2007.
  • G. Wallis, One Dimensional Two Phase Flows, Mc-Graw Hill, 1969.

Instructor bio

Prof. Rajesh Kumar Upadhyay

IIT(BHU) Varanasi
Dr. Rajesh Kumar Upadhyay is serving as Associate Professor in the Department of Chemical Engineering at Indian Institute of Technology Guwahati. He has joined IIT Guwahati as an Assistant Professor in July 2010 after completing his PhD from IIT Delhi. During his PhD, he has worked on development of Radioactive particle tracking technique and implementation of the same on different multiphase flow reactors like gas-liquid, gas-solids and gas-liquid-solids system. He has taught Multiphase Flow in IIT Guwahati as an elective course to UG, PG and PhD students for four consecutive years.

Course certificate

The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
Date and Time of Exams: 27 March 2022 Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
Registration url: Announcements will be made when the registration form is open for registrations.
The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.


Average assignment score = 25% of average of best 6 assignments out of the total 8 assignments given in the course.
Exam score = 75% of the proctored certification exam score out of 100

Final score = Average assignment score + Exam score

YOU WILL BE ELIGIBLE FOR A CERTIFICATE ONLY IF AVERAGE ASSIGNMENT SCORE >=10/25 AND EXAM SCORE >= 30/75. If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.

Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Madras .It will be e-verifiable at nptel.ac.in/noc.

Only the e-certificate will be made available. Hard copies will not be dispatched.

Once again, thanks for your interest in our online courses and certification. Happy learning.

- NPTEL team

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