Gretar Tryggvason

About

Gretar Tryggvason is the Charles A. Miller, Jr. Distinguished Professor in mechanical engineering and head of the Department of Mechanical Engineering at Johns Hopkins University. He is widely recognized for his contributions to computational fluid dynamics, including the development of methods for computations of multiphase flows and pioneering direct numerical simulations of such flows. His research areas include computations of multiphase flows, heat transfer, boiling, cavitation, solidification, surfactants, and reactions, with applications to turbulent bubbly flows, atomization, additive manufacturing, and other problems. Tryggvason has also worked on numerical methods for tracking sharp fluid interfaces, averaged and reduced order models of multiphase flows, and multiscale approaches to capture small-scales in multiphase flows.

Research topics

• Computer Science
• Mechanics
• Physics
• Simulation
• Computational science
• Geology
• Parallel computing
• Thermodynamics
• Classical mechanics

Selected publications

• Computational fluid dynamics

  Elsevier eBooks · 2024 · 71 citations

  1st authorCorresponding
  PublisherDOI

• PArallel, Robust, Interface Simulator (PARIS)

  Computer Physics Communications · 2021 · 59 citations

  Paris (PArallel, Robust, Interface Simulator) is a finite volume code for simulations of immiscible multifluid or multiphase flows. It is based on the “one-fluid” formulation of the Navier–Stokes equations where different fluids are treated as one material with variable properties, and surface tension is added as a singular interface force. The fluid equations are solved on a regular structured staggered grid using an explicit projection method with a first-order or second-order time integration…

  DOI

• A mass-momentum consistent, Volume-of-Fluid method for incompressible flow on staggered grids

  Computers & Fluids · 2020 · 59 citations

  The computation of flows with large density contrasts is notoriously difficult. To alleviate the difficulty we consider a discretization of the Navier-Stokes equation that advects mass and momentum in a consistent manner. Incompressible flow with capillary forces is modeled and the discretization is performed on a staggered grid of Marker and Cell type. The Volume-of-Fluid method is used to track the interface and a Height-Function method is used to compute surface tension. The advection of the…

  DOI

• Bubbles and bubbly flows

  International Journal of Multiphase Flow · 2025-04-30 · 23 citations

  articleOpen access

  Bubbles and bubbly flows are omnipresent in nature and technology, showing a multitude of phenomena, which can be either beneficial or a hindrance. In any case, for their control and their applications, it is crucial to understand their fundamentals and therefore from the very beginning of the International Journal of Multiphase Flow they have been central. In this synoptic review we give some examples for the fascinating fluid dynamics of bubbles and bubbly flows, starting from their nucleation…

  PublisherDOI

• Numerical investigation of flow boiling characteristics of R134A in a smooth horizontal tube

  International Journal of Heat and Mass Transfer · 2024-04-26 · 19 citations

  article
  PublisherDOI

Recent grants

• Multiscale Simulations of Multiphase Flows

  NSF · $339k · 2013–2017

• CDS&E: Collaborative Research: Fast Numerical Simulations of Low Void Fraction Disperse Multiphase Systems using Event-Triggered Communication

  NSF · $239k · 2020–2023

• Multiscale Simulations of Multiphase Flows

  NSF · $277k · 2011–2014

Frequent coauthors

• Jiacai Lu

  128 shared

• Stéphane Zaleski

  Sorbonne Université

  54 shared

• Asghar Esmaeeli

  Southern Illinois University Carbondale

  32 shared

• Bernard Bunner

  22 shared

• Ruben Scardovelli

  University of Bologna

  22 shared

• Werner J. A. Dahm

  Arizona State University

  21 shared

• Shunji Homma

  Saitama University

  19 shared

• Yue Ling

  Baylor University

  18 shared

Awards & honors

• Charles A. Miller, Jr. Distinguished Professor

Similar researchers at Johns Hopkins University

• Joseph Katzh-84
• Rajat Mittalh-68
• Louis Whitcombh-54