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Grants / National Science Foundation / U.S. National Science Foundation

NSF PD-23-1415: Particulate and Multiphase Processes

Closed Closed Opportunity NSF PD-23-1415

This grant is closed. A newer notice from the same program is open now: Major Research Instrumentation Program: (MRI) (NSF 27-500). Status: Closes January 29, 2027 (83 days left). It is in our archive of U.S. National Science Foundation notices from 2023.

U.S. National Science Foundation offered grants to any type of organization. It expected to make $8.3 million in total. It is no longer open on Grants.gov.

From the official notice on Grants.gov, last changed August 12, 2026. Checked November 7, 2026.

Other notices with this title

U.S. National Science Foundation has posted this title under other numbers: earlier or later rounds, or the same competition for another area. Each has its own dates and may change its rules.

NoticePostedDeadlineStatus
NSF PD-20-1415June 6, 2025ClosedClosed

Key dates

PostedApril 5, 2023
Archived by Grants.govAugust 13, 2026

Who can apply

This opportunity was open to any type of organization.

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Is this a realistic fit?

What the grant funds

The Particulate and Multiphase Processes program is part of the Transport Phenomena cluster, which also includes 1) the Combustion and Fire Systems program; 2) the Fluid Dynamics program; and 3) the Thermal Transport Processes program. The goal of the Particulate and Multiphase Processes program is to support fundamental research on physico-chemical phenomena that govern particulate and multiphase systems, including flow of suspensions, drops and bubbles, granular and granular-fluid flows, behavior of micro- and nanostructured fluids, unique characteristics of active fluids, and self assembly/directed-assembly processes that involve particulates. The program encourages transformative research to improve our basic understanding of particulate and multiphase processes with emphasis on research that demonstrates how particle-scale phenomena affect the behavior and dynamics of larger-scale systems. Although proposed research should focus on fundamentals, a clear vision is required that anticipates how results could benefit important applications in advanced manufacturing, energy harvesting, transport in biological systems, biotechnology, or environmental sustainability. Collaborative and interdisciplinary proposals are encouraged, especially those that involve a combination of experiment with theory and/or modeling. Major research areas of interest in the program include: Multiphase flow phenomena: Dynamics of particle/bubble/droplet systems, behavior of structured fluids (colloids/ferro-fluids), granular flows, rheology of multiphase systems, unique characteristics of active fluids in novel applications, and newl approaches that relate micro- and nanoscale phenomena to macroscale properties and process-level variables. Particle science and technology: Aerosols, production of particles and polymer-particle complexes with engineered properties, self-assembly, directed assembly, and template-directed assembly of particles into functional materials and devices. Multiphase transport in biological systems: Analysis of physiological processes, applications of functionalized nanostructures in clinical diagnostics and therapeutics. Interfacial transport: Dynamics of particles and macromolecules at interfaces, kinetics of adsorption and desorption of nanoparticles and surfactants and their spatial distributions at interfaces, complex molecular interactions at interfaces, formation of interfacial complexes that affect the dynamics of particles.

Category: Science and Technology and other Research and Development.

Who has won Engineering grants before

From fiscal 2021 to 2025, Engineering (47.041) awarded $4.3 billion across 11,244 grant awards, an average of $385,774 per award.

Largest recipients, fiscal 2021 to 2025
RecipientStateAwardsAmount
Georgia Tech Research CorpGeorgia193$106 million
Purdue UniversityIndiana238$106 million
Regents of the University of MichiganMichigan250$101 million
University of California, San DiegoCalifornia114$96.4 million
The Trustees of the University of PennsylvaniaPennsylvania59$80.6 million

Top states: California ($485 million), Texas ($346 million), New York ($297 million), Pennsylvania ($269 million), Massachusetts ($265 million).

Applying now

This notice no longer takes applications. Apply under the newer notice, NSF 27-500, which is open now.

The notice on Grants.gov keeps its full text and attachments, which is useful for planning a resubmission.

Questions people ask

Is NSF PD-23-1415 still open?

No. It is no longer open on Grants.gov. A newer notice is open: NSF 27-500, closes January 29, 2027 (83 days left).

Who can apply for Particulate and Multiphase Processes?

U.S. National Science Foundation accepted applications from any type of organization.

What is the deadline for Particulate and Multiphase Processes?

Closed. Applications are no longer accepted; the program's newer notices are on this page when there are any.

How much funding is available?

About $8.3 million in total.

Who has won Engineering grants before?

The largest recipients over five fiscal years were Georgia Tech Research Corp, Purdue University, Regents of the University of Michigan. The program made 11,244 awards worth $4.3 billion in that time.

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