Search Results - "Lahey, Richard T."

Progress in multiphase computational fluid dynamics by Lahey, Richard T., Baglietto, Emilio, Bolotnov, Igor A.

“…•Review of multiphase computational fluid dynamics models over the last four decades.•Flow boiling models for CFD.•Direct numerical simulation support for MCFD…”
Get full text

Detached direct numerical simulations of turbulent two-phase bubbly channel flow by Bolotnov, Igor A., Jansen, Kenneth E., Drew, Donald A., Oberai, Assad A., Lahey, Richard T., Podowski, Michael Z.

“…DNS simulations of two-phase turbulent bubbly channel flow at Re τ = 180 (Reynolds number based on friction velocity and channel half-width) were performed…”
Get full text

The simulation of multidimensional multiphase flows by Lahey, Richard T.

“…This paper presents an assessment of various models which can be used for the multidimensional simulation of multiphase flows, such as may occur in nuclear…”
Get full text

Hydrodynamic simulation of air bubble implosion using a level set approach by Nagrath, Sunitha, Jansen, Kenneth, Lahey, Richard T., Akhatov, Iskander

“…The hydrodynamics of the implosion and rebound of a small (10 μm diameter) air bubble in water was studied using a three-dimensional direct numerical…”
Get full text

Computation of incompressible bubble dynamics with a stabilized finite element level set method by Nagrath, Sunitha, Jansen, Kenneth E., Lahey, Richard T.

“…This paper presents a stabilized finite element method for the three dimensional computation of incompressible bubble dynamics using a level set method. The…”
Get full text

Direct numerical simulation of turbulent channel flows using a stabilized finite element method by Trofimova, Alisa V., Tejada-Martínez, Andrés E., Jansen, Kenneth E., Lahey, Richard T.

“…Direct numerical simulations (DNS) of incompressible turbulent channel flows at Re τ = 180 and 395 (i.e., Reynolds number, based on the friction velocity and…”
Get full text

On the direct numerical simulation of two-phase flows by Lahey, Richard T.

“…This paper presents the direct numerical simulation (DNS) of various incompressible and compressible single and two-phase flows. It is shown that very detailed…”
Get full text

Spectral analysis of turbulence based on the DNS of a channel flow by Bolotnov, Igor A., Lahey, Richard T., Drew, Donald A., Jansen, Kenneth E., Oberai, Assad A.

“…The development and assessment of spectral turbulence models requires knowledge of the spectral turbulent kinetic energy distribution as well as an…”
Get full text

PARALLEL ADAPTIVE SIMULATION OF A PLUNGING LIQUID JET by Galimov, Azat Yu, Sahni, Onkar, Lahey, Richard T., Shephard, Mark S., Drew, Donald A., Jansen, Kenneth E.

“…This paper is concerned with three-dimensional numerical simulation of a plunging liquid jet. The transient processes of forming an air cavity around the jet,…”
Get full text

A parallel adaptive mesh method for the numerical simulation of multiphase flows by Rodriguez, Joseph M., Sahni, Onkar, Lahey, Richard T., Jansen, Kenneth E.

“…Methodology for performing large scale parallel numerical simulations of two-phase flow is presented that uses a three-dimensional (3-D) finite element method…”
Get full text

Modeling air entrainment and transport in a hydraulic jump using two-fluid RANS and DES turbulence models by Ma, Jingsen, Oberai, Assad A., Lahey, Richard T., Drew, Donald A.

“…Both RaNS (Reynolds-averaged Navier–Stokes) and DES (Detached Eddy Simulation) type turbulence models were used in conjunction with a two-fluid model of bubbly…”
Get full text

An analysis of interacting instability modes, in a phase change system by Schlichting, William R., Lahey, Richard T., Podowski, Michael Z.

“…This paper presents an analysis of the interaction of pressure-drop oscillations (PDO) and density-wave oscillations (DWO) for a typical NASA type phase change…”
Get full text

Two-fluid modeling of bubbly flows around surface ships using a phenomenological subgrid air entrainment model by Ma, Jingsen, Oberai, Assad A., Hyman, Mark C., Drew, Donald A., Lahey, Richard T.

“…► Phenomenological subgrid model for the location and rate of air entrainment around surface ships. ► RaNS two-fluid model for the subsequent bubbly flow…”
Get full text

Turbulent cascade modeling of single and bubbly two-phase turbulent flows by Bolotnov, Igor A., Lahey, Richard T., Drew, Donald A., Jansen, Kenneth E.

“…The analysis of turbulent two-phase flows requires closure models in order to perform reliable computational multiphase fluid dynamics (CMFD) analyses. A…”
Get full text

The effect of acoustically-induced cavitation on the permeance of a bullfrog urinary bladder by Cancelos, Silvina, Moraga, Francisco J., Lahey, Richard T., Shain, William, Parsons, Robert H.

“…It is well known that ultrasound enhances drug delivery to tissues, although there is not a general consensus about the responsible mechanisms. However, it is…”
Get full text

The analysis of two-phase flow and heat transfer using a multidimensional, four field, two-fluid model by Lahey, Richard T., Drew, Donald A.

“…This paper reviews the state-of-the-art in the prediction of multidimensional multiphase flow and heat transfer phenomena using a four field, two-fluid model…”
Get full text

Sonofusion: EA optimisation of acoustic resonator by Stokmaier, Markus J., Class, Andreas G., Schulenberg, Thomas, Lahey Jr, Richard T.

“…We present a novel recipe combining evolutionary algorithm (EA) concepts, robust against local optima, for high‐dimensional multimodal optimisation problems,…”
Get full text

Sonofusion technology revisited by Lahey, Richard T., Taleyarkhan, Rusi P., Nigmatulin, Robert I.

“…Sonoluminescence and sonofusion phenomena may occur when vapor bubbles implode. This paper reviews the status of our understanding of the bubble dynamics…”
Get full text

The analysis of interfacial waves by Galimov, Azat Yu, Drew, Donald A., Lahey, Richard T., Moraga, Francisco J.

“…We present analytical results for stable stratified wavy two-phase flow and functional forms for the various interfacial force densities in a two-fluid model…”
Get full text

On the Use of Nonlinear Filtering, Artificial Viscosity, and Artificial Heat Transfer for Strong Shock Computations by Bae, Song-Hyo, Lahey, Richard T

“…A new artificial viscosity (Q) model, based on physical conservation corrections for momentum, and a new artificial heat transfer (H) formulation are developed…”
Get full text