Course Description & Aim
This short course aims to present the current understanding and state of the art of capillarity (wetting, capillary flow, surface fabrication), drops (sessile, impacting, sliding) atomization fundamentals, and generation and application of sprays in a variety of engineering branches, including spray drying, spray coating, spray cooling, fuel injection, etc.
These aspects are addressed theoretically in terms of hydrodynamic instabilities of liquid jets and sheets, followed by mechanisms of breakup and coalescence of single drops.
These fundamentals are accompanied by topics on diagnostics and numerical simulations as well as advanced topics and applications. The program foresees discussions among the participants and the lecturers. The aim is to address on-going development and application problems suggested by the participants.
Dates of the Workshop : 17th - 19th February, 2025
Name of the Instructor(s)
Prof. Shamit Bakshi
Dept. Mechanical Engineering, IIT Madras, India
Prof. Saptarshi Basu
Dept. Mechanical Engineering, IISc Bangalore, India
Prof. Sanjeev Chandra
Dept. Mechanical and Industrial Engineering,
University of Toronto, Canada
Prof. Pallab Sinha Mahapatra
Dept. Mechanical Engineering, IIT Madras, India
Prof. Vagesh D. Narasimhamurthy
Dept. Applied Mechanics, IIT Madras, India
Prof. Mahesh Panchagnula
Dept. Applied Mechanics, IIT Madras, India
Prof. Arvind Pattamatta
Dept. Mechanical Engineering, IIT Madras, India
Prof. Srikrishna Sahu
Dept. Mechanical Engineering, IIT Madras, India
Prof. Ashis Kumar Sen
Dept. Mechanical Engineering, IIT Madras, India
Prof. Satyanarayanan Seshadri
Dept. Applied Mechanics, IIT Madras, India
Prof. Cameron Tropea
Mechanical Engineering, TU Darmstadt,
Germany, Dept. Mechanical Engineering, IIT Madras
The course is held in-hybrid mode on the IITM campus. All lectures will be recorded and subsequently offered by NPTEL as a credit course. The participants will receive an electronic version of all presented lecture material. Ample time is allotted for Q&A following each lecture as well as for in-depth discussions with the lecturers.
Course Schedule
Day 1 : Capillarity
| 8:00 |
Registration |
| 9:00 |
Welcome, Introductions, Overview of course
-Cameron Tropea |
| 9:30 |
Fundamentals of capillary flows (Laplace pressure, Laplace-Young eq., contact angles, meniscus)
-Ashis Sen |
| 10:30 |
Break |
| 11:00 |
Stability of Liquid Jets and Sheets (Plateau-Rayleigh, Rayleigh-Taylor, Kelvin-Helmholtz)
-Saptarshi Basu |
| 12:00 |
Fundamentals of Visualization and Signal/Image Processing (Shadow imaging, Background removal, normalization, contouring, thresholding)
-Shamit Bakshi |
| 13:00 |
Lunch |
| 14:00 |
Measurement of Capillary Flows and Wetting Phenomena (Interferometry, confocal microscopy, chromatic confocal sensors, APIV)
-Cameron Tropea |
| 15:00 |
Surface Fabrication and Characterisation
-Pallab Mahapatra |
| 16:00 |
Modeling of transport phenomena of drops
-Srikrishna Sahu |
| 17:00 |
Close of the first day |
Day 2 : Drops and Atomization
| 9:00 |
Fundamentals of Atomization (overview of atomizers, primary atomization)
-Mahesh Panchagnula |
| 10:00 |
Secondary Atomization - Saptarshi Basu |
| 11:00 |
Break |
| 11:30 |
Measurement of Drops and Sprays (Phase Doppler, Depth from Defocus, Laser Diffraction)
-Cameron Tropea |
| 12:30 |
Lunch |
| 14:00 |
Drop/Wall Interaction (impact onto surfaces, films, porous media)
-Sanjeev Chandra |
| 15:00 |
Spray Cooling (Film-, Transitional-, Nucleate boiling)
- Satyanarayanan Seshadri |
| 16:00 |
Spray Painting - Sanjeev Chandra |
| 17:00 |
Close of the second day |
Day 3 : Applications I
| 9:00 |
Thermal spray coating - Sanjeev Chandra |
| 10:00 |
IR Imaging (Cameras, Resolution, Response, calibration, measurement of temperature and heat flux
-Arvind Pattamatta |
| 11:00 |
Break |
| 11:30 |
Slinger/Rotary Atomization - Srikrishna Sahu |
| 12:30 |
Lunch |
| 13:30 |
Additive Manufacturing by Thermal Sprays
-Sanjeev Chandra |
| 14:30 |
A survey on numerical simulation methods for multiphase flows.
-Vagesh D. Narasimhamurthy |
| 15:30 |
Break |
| 16:00 |
RANS and DES modeling of primary atomization.
-Vagesh D. Narasimhamurthy |
| 17:00 |
Close of Course |
Eligibility & Fees
Eligibility: Industry professionals, Faculty, Scholars and Students
Fees for the workshop:
Students (Online) : ₹ 2360 (₹ 2000 + 18% GST)
Session Details
Mode of workshop: ONLINE
Dates : 17th - 19th February, 2025
Session 1 : Capillarity
Date : 17th February, 2025
Timings: 08:00 a.m. – 05:00 p.m.
Session 2 : Drops and Atomization
Date : 18th February, 2025
Timings: 09:00 a.m. – 05:00 p.m.
Session 3 : Applications I
Date : 19th February, 2025
Timings: 09:00 a.m. – 05:00 p.m.
Intended Audience
- This course is directed towards practicing Engineers, Researchers, and graduate students involved in R&D and or working with systems involving the generations and application of drops and sprays.
- For those with little previous background, the course begins with fundamentals of atomization and proceeds through Theoretical, Experimental, Numerical, and Application topics.
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