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Personal profile

Research Interests

Current topics of interest include investigations of a broad class of problems where there is a competition between order and disorder, such as in mixing and segregation of granular matter or fluid mixing and, more generally, problems in the realm of complex systems involving tools such as agent-based models and network theory.

The interest in basic understanding of mixing lies in the ubiquity of mixing processes in technology and nature; examples are found in chemical, mechanical, and aeronautical engineering, but also in geophysics, physiology, oceanography, polymer engineering, and environmental sciences.

The work in granular dynamics involves a blend of theory, computations, and experimental work that reaches into applications. While important to a wide range of industries, our understanding of solid mixing and segregation is primitive. Some key questions we are currently addressing are: What features of mixing can be predicted computationally? What causes demixing and how it interplays with mixing? How can mixing be optimized?

Education/Academic qualification

Chemical Engineering, PhD, University of Minnesota

… → 1979

Chemical Engineering, Diploma, National University of La Plata, Argentina

… → 1974

Research interests

  • Complex systems
  • dynamics of granular matter
  • mixing and segregation processes

Fingerprint Dive into the research topics where Julio M Ottino is active. These topic labels come from the works of this person. Together they form a unique fingerprint.

  • 2 Similar Profiles
Segregation Mathematics
granular materials Physics & Astronomy
Granular materials Engineering & Materials Science
Granular Flow Mathematics
Fluids Engineering & Materials Science
Advection Engineering & Materials Science
Stretching Engineering & Materials Science
Granular Materials Mathematics

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Grants 1995 2022

Research Output 1979 2019

2 Citations (Scopus)

Cutting and shuffling a hemisphere: Nonorthogonal axes

Lynn, T. F., Smith, L. D., Ottino, J. M., Umbanhowar, P. B. & Lueptow, R. M., Mar 7 2019, In : Physical Review E. 99, 3, 032204.

Research output: Contribution to journalArticle

hemispherical shells
3 Citations (Scopus)

Diffusion, mixing, and segregation in confined granular flows

Fry, A. M., Umbanhowar, P. B., Ottino, J. M. & Lueptow, R. M., Mar 2019, In : AIChE Journal. 65, 3, p. 875-881 7 p.

Research output: Contribution to journalArticle

Shear flow
Finite difference method

Granular segregation induced by a moving subsurface blade

Dwivedi, V., Ottino, J. M., Lueptow, R. M. & Umbanhowar, P. B., Nov 8 2019, In : Physical Review E. 100, 5, 052902.

Research output: Contribution to journalArticle

Characteristic numbers
4 Citations (Scopus)

Modeling segregation in granular flows

Umbanhowar, P. B., Lueptow, R. M. & Ottino, J. M., Jun 7 2019, In : Annual Review of Chemical and Biomolecular Engineering. 10, p. 129-153 25 p.

Research output: Contribution to journalReview article

Open Access
Finite difference method
Computer simulation
Constitutive equations
1 Citation (Scopus)

Modeling segregation of polydisperse granular materials in developing and transient free-surface flows

Deng, Z., Umbanhowar, P. B., Ottino, J. M. & Lueptow, R. M., Mar 2019, In : AIChE Journal. 65, 3, p. 882-893 12 p.

Research output: Contribution to journalArticle

Granular materials
Normal Distribution
Particle Size
Normal distribution