A review of impinging jets during rocket launching

C Jiang, T Han, Z Gao, CH Lee - Progress in Aerospace Sciences, 2019 - Elsevier
During rocket launching, the engine exhaust impinges on the launch structures, such as the
launch platform and the jet deflector, leading to a complex flowfield and generating strong …

Near-field plume-surface interaction and regolith erosion and dispersal during the lunar landing

A Rahimi, O Ejtehadi, KH Lee, RS Myong - Acta Astronautica, 2020 - Elsevier
A rocket plume impinging on the lunar surface when a lunar lander approaches a landing
site can cause significant dust dispersal. This study investigated the near-field rocket plume …

A two-way coupled Euler-Lagrange method for simulating multiphase flows with discontinuous Galerkin schemes on arbitrary curved elements

EJ Ching, SR Brill, M Barnhardt, M Ihme - Journal of Computational Physics, 2020 - Elsevier
In this work, we develop a Lagrangian point-particle method to support high-speed dusty
flow simulations with discontinuous Galerkin schemes. The carrier fluid is treated in an …

Gas-particle flows in a microscale shock tube and collection efficiency in the jet impingement on a permeable surface

O Ejtehadi, TK Mankodi, I Sohn, BJ Kim, RS Myong - Physics of Fluids, 2023 - pubs.aip.org
We investigate the flow physics of non-equilibrium gases in interaction with solid particles in
a microscale shock tube and the collection efficiency in the jet impingement on a permeable …

Thermal and flow characteristics of nonequilibrium monatomic, diatomic, and polyatomic gases in cylindrical Couette flow based on second-order non-Navier–Fourier …

T Chourushi, A Rahimi, S Singh, O Ejtehadi… - International Journal of …, 2022 - Elsevier
The thermal and flow characteristics of nonequilibrium monatomic, diatomic, and polyatomic
gases in cylindrical Couette flow are investigated using first-and second-order Boltzmann …

Plume-surface interaction during lunar landing using a two-way coupled DSMC-DEM approach

A Bajpai, A Bhateja, R Kumar - Physical Review Fluids, 2024 - APS
In the present work, a numerical framework is developed for simulating gas-solid flows
associated with interaction of a rocket plume on a planetary surface. For this investigation, a …

[HTML][HTML] Investigation of shock and a dust cloud interaction in Eulerian framework using a newly developed OpenFOAM solver

O Ejtehadi, E Mahravan, I Sohn - International Journal of Multiphase Flow, 2021 - Elsevier
The current study documents the development of a new multiphase solver for the simulation
of dilute dusty gas flows in the OpenFOAM suite. Even though various solvers for simulation …

A modal discontinuous Galerkin method for simulating dusty and granular gas flows in thermal non-equilibrium in the Eulerian framework

O Ejtehadi, RS Myong - Journal of Computational Physics, 2020 - Elsevier
A modal discontinuous Galerkin method was developed for computing compressible
rarefied gaseous flows interacting with rigid particles and granular medium. In contrast to …

Full continuum approach for simulating plume-surface interaction in planetary landings

O Ejtehadi, RS Myong, I Sohn, BJ Kim - Physics of Fluids, 2023 - pubs.aip.org
A high-fidelity computational framework for predicting the interaction of a rocket plume with a
dust blanket in an almost vacuum ambient that represents the descent/ascend phase of …

Numerical analysis of nucleate boiling in rolling rod bundle with tilted axis using two-fluid modeling approach

O Ejtehadi, A Sadeghi, BJ Kim - International Journal of Heat and Mass …, 2023 - Elsevier
In this study, an Eulerian-Eulerian two-fluid approach was applied to simulate nucleate
boiling in a vertical rolling 2× 2 rod bundle with a tilted axis. For this purpose, the standard …