+91-512-259-7629

head_che@iitk.ac.in

Yogesh M. Joshi

Mr. & Mrs. Gian Singh Bindra Chair Professor

  • Email

    joshi[AT]iitk.ac.in

  • Office Phone No.

    +91-512-259-7993 (Office)
    +91-512-259-7993 (Lab)

  • Office & Lab

    SL-114

  • Group Home Page IRINS Profile

Research Interest

  • Structure and dynamics of Colloidal Glasses and Gels
  • Soft Matter
  • Rheology of Complex Fluids
  • Polymer Science and Engineering, Polymer Nanocomposites

Education

  • B.E. University of Pune, 1996
  • Ph.D. IIT-Bombay, Mumbai; National Chemical Laboratory, Pune 2001
  • Post Doctoral Research, Benjamin Levich Institute for Physico-Chemical Hydrodynamics, New York, 2001-2004

Research Overview

Our group is interested in understanding physical behavior and dynamics of structured fluids. We combine expertise from Chemical Engineering, Physics, Chemistry and Materials Science to understand molecular phenomena that is responsible for the flow behavior. Major thrust area of our group is to understand ageing and effect of deformation on the variety of soft glassy materials such as concentrated suspensions, glassy polymers and polymer nanocomposites. Common theme in all these systems is their jammed state wherein primary entity (particle or molecular segment) is physically arrested due to overall crowding of constituents. In such state, system explores only a small part of the phase space thereby leading to a glassy behavior. Recently we showed that how rheological characterization can give profound insight into the ageing of colloidal glasses compared to that of colloidal gels. We also investigated effect of deformation on the ageing suspensions and how influence of the same on relaxation dynamics can be used to predict long time rheological behavior of these materials. We are also involved in understanding rheological behavior of discotic nematic suspensions, particularly their intriguing flow behaviors that are industrially very important.

Awards

  • J C Bose Fellowship (2023) of Science and Engineering Research Board, Department of Science and Technology, Government of India
  • Fellow, Indian Academy of Sciences (2023)
  • Fellow, Indian National Science Academy (2022)
  • Fellow of the Society of Rheology, US (SoR) (2022)
  • Academy excellence award of the Defense Research and Development Organization (2019)
  • Distinguished Teacher Award of IIT Kanpur (2018)
  • Fellow, National Academy of Sciences, India (2017)
  • Fellow, Indian National Academy Engineering (2016)
  • Prof. C.V.Seshadri Chair Professor, IIT Kanpur (2015-2018)
  • Shanti Swarup Bhatnagar Award in Engineering Sciences (2015)
  • P.K. Kelkar Fellowship, IIT Kanpur (2013-2016)
  • INSA Medal for Young Scientist (2006)

Publications

  • Yogesh M Joshi, Analysing gelation transition through fractional viscoelasticity and Mittag-Leffler-Prabhakar function, arXiv preprint arXiv:2606.26656, (2026).
  • Yogesh M Joshi, Evolution of Linear Viscoelasticity across the Critical Gelation Transition: Unification of Symmetry and Hyperscaling, Macromolecules, (2026).
  • Shrajesh Patel, Kalyani Agarwal, Sumanth Arnipally, Amarnath Miriyala, Ganesh Gopal, Yogesh M Joshi, Gelation in Oleogels: A Rheological Framework for Soft Material Formulation, Langmuir, 42, 15740-15753 (2026).
  • V Kumar, T Bhattacharyya, S Sharma, S Appavoo, S Mahapatra, YM Joshi, Micelle structure and dynamic wetting in cationic–nonionic surfactant systems for surface cleaning applications, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 737, 139918 (2026).
  • A Kumar, R Yadav, YM Joshi, M K Singh, Nano-Clay-Stabilized Water-in-Oil Colloidal Pickering Emulsions as Thixotropic Lubricant, arXiv preprint arXiv:2605.11004, (2026).
  • Yogesh M Joshi, Teanoosh Moaddel, Janhavi S Raut, Beyond Clean: Unraveling Phase Behavior and Rheology of Soaps, Annual Review of Chemical and Biomolecular Engineering, 17 (2026).
  • S Shanbhag, V Kumar, YM Joshi, Isolating the medium amplitude oscillatory shear regime via constitutive modeling, Journal of Rheology, 70, 281-297 (2026).
  • S V Kawale, Y M Joshi, R Bandyopadhyay, Thermal history asymmetry and dissipation in dense colloidal microgel glasses, Journal of Colloid and Interface Science, 139830 (2026).
  • B Loppinet, N A Burger, A Clarke, Y M Joshi, G Petekidis, Soft glassy dynamics and yielding of nanoclay suspensions at high pressure, Available at SSRN 6998403, (2026).
  • S Mittal, S Shanbhag, YM Joshi, When spectroscopies speak the same language: Unifying rheology, electrochemical impedance, and dielectrics, ACS Measurement Science Au, (2026).
  • A Kumar, V Kumar, YM Joshi, M K Singh, Nano-silica based aqueous colloidal gels as eco-friendly thixotropic lubricant, Journal of Colloid and Interface Science, 700, 138486 (2025).
  • V Kumar, G H McKinley, Y M Joshi, Hyperaging and stress buildup in soft colloidal gels, Journal of Rheology, 69, 855-871 (2025).
  • Yogesh M Joshi, Alexander Ya Malkin, Plastic or Viscous? A Reappraisal of Yielding in Soft Matter, ACS Engineering Au, 5, American Chemical Society, (2025).
  • V Kumar, Y M Joshi, Rheological behavior of colloidal silica dispersion: Irreversible aging and thixotropy, Langmuir, 41, 22804-22819 (2025).
  • R Batra, Y M Joshi, S Shanbhag, Navigating small datasets with machine learning: Gaussian process modeling for colloidal gelation, Langmuir, 41, 21232-21242 (2025).
  • V Kumar, GH McKinley, YM Joshi, Shear Stress Build-up Under Constant Strain Conditions in Soft Glassy Materials, arXiv preprint arXiv:2504.00806, (2025).
  • YM Joshi, Linear Viscoelasticity of Physically Aging Soft Glassy (Thixotropic) Materials, Current Opinion in Colloid & Interface Science, 101896 (2025).
  • GS He, S Gupta, RA Vaia, YM Joshi, PN Prasad, Two-photon pumped forward, backward and random lasing in a stilbazolium dye nanocomposite solution containing LAPONITE® as a scattering center, Nanoscale, (2025).
  • S Gupta, GS He, V Kumar, A Pitter, M Trebbin, MT Swihart, RK Kumar, Dramatic Enhancement of One and Two Photon-Excited Emission of a Stilbazolium Dye Coupled to Laponite Platelets, The Journal of Physical Chemistry C, 128 (42), 17961-17970 (2024).
  • S Sharma, YM Joshi, V Shankar, Transient shear banding during startup flow: Insights from nonlinear simulations, Physics of Fluids, 36 (9) (2024).
  • YM Joshi, PERSPECTIVE: Analysis of thixotropic timescale, Journal of Rheology, 68 (4), 641-653 (2024).
  • S GUPTA, GS He, A Pitter, M Trebbin, M Swihart, Y Joshi, R Vaia, Amplification of One-and Two-Photon Excited Emission of a Stilbazolium Dye–Laponite Hybrid, MDPI, (2024).
  • S Mittal, YM Joshi, S Shanbhag, Harmonic balance for differential constitutive models under oscillatory shear, Physics of Fluids, 36 (5) (2024).
  • S Mittal, S Shanbhag, Y Joshi, Fast and Accurate Numerical Methods for Evaluating Constitutive Models under Large Amplitude Oscillatory Shear, Bulletin of the American Physical Society, (2024).
  • T Divoux, E Agoritsas, S Aime, C Barentin, JL Barrat, R Benzi, L Berthier, Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions, Soft Matter, 20 (35), 6868-6888 (2024).
  • S Mittal, YM Joshi, S Shanbhag, Harmonic Balance for Differential Constitutive Models under Oscillatory Shear, arXiv:2403.05971, (2024).
  • A Kumar, V Kumar, YM Joshi, MK Singh, Tribological and Rheological Study of Thixotropic Gels of 2D Nanoparticles, Langmuir, 40, 14, 7310–7327 (2024).
  • S Mittal, YM Joshi, S Shanbhag, Can numerical methods compete with analytical solutions of linear constitutive models for large amplitude oscillatory shear flow?, Rheologica Acta, 63, 2, 145-155 (2024).
  • YM Joshi, S Patel, K Suman, Aqueous Laponite® dispersions are attractive gels, not repulsive Wigner glasses: A critical commentary, J. Rheol., 68, 145–152 (2024).
  • T Bhattacharyya, CS Palla, DH Dethe, YM Joshi, Rheological investigation of the network structure in mixed gels of Kappa and Iota Carrageenan, Food Hydrocolloids, 146, Part B, 109298 (2024).
  • S Mittal, YM Joshi, S Shanbhag, The Method of Harmonic Balance for the Giesekus Model under Oscillatory Shear, Journal of Non-Newtonian Fluid Mechanics , 321, 105092 (2023).
  • T Bhattacharyya, CS Palla, DH Dethe, YM Joshi, Rheological investigation of the network structure in mixed gels of Kappa and Iota Carrageenan, arxiv.org/abs/2309,12896 (2023).
  • H Heinz, YM Joshi, H Zeng, HK Tsao, SJA de Beer, E Koos, A Takahara, GC Walker, Highlights in Interface Science and Engineering: A Collection of Virtual Special Issues, Langmuir, 39 (31), 10711-10714 (2023).
  • T Bhattacharyya, AR Jacob, G Petekidis, YM Joshi, On the nature of flow curve and categorization of thixotropic yield stress materials, Journal of Rheology, 67 (2), 461-477 (2023).
  • S Sharma, YM Joshi, V Shankar, Transient shear banding during startup flow: Insights from nonlinear simulations, arXiv preprint , (2023).
  • K Suman, S Shanbhag, YM Joshi, Large amplitude oscillatory shear study of a colloidal gel near the critical state, The Journal of Chemical Physics , 158 (5) (2023).
  • T Bhattacharyya, K Suman, YM Joshi, Gel-sol transition of thermoresponsive poly (vinyl alcohol) solution: Validation of the universal critical scaling relations, Physics of Fluids, 35 (2) (2023).
  • S Sharma, V Shankar, YM Joshi, Viscoelasticity and rheological hysteresis, Journal of Rheology, 67 (1), 139-155 (2023).
Complete list of Publications Complete list of Awards Courses Taught