114 citations · 557 across the 16 of their papers we have counts for
17 papers
From localized dryout to convective elongated vapor structures: Reynolds number effects on boiling transition in a rectangular mini-channel
Qi Wang, Xin Wang, Mingze Wang +5
Three-dimensional conjugate simulations were conducted to investigate saturated flow boiling in a rectangular mini-channel, with particular emphasis on the role of inlet Reynolds n…
Energy analysis of 2D electro-thermo-hydrodynamic turbulent convection
Owen Hutchinson, Katerina Kostova, Jian Wu +1
Turbulent convection is ubiquitous in fluid systems. In particular, multi-physical convection problems involve mass, heat, and particle transfer. When the particles are charged and…
Learning Closed-form Equations for Subgrid-scale Closures from High-fidelity Data: Promises and Challenges
Karan Jakhar, Yifei Guan, Rambod Mojgani +2
There is growing interest in discovering interpretable, closed-form equations for subgrid-scale (SGS) closures/parameterizations of complex processes in Earth systems. Here, we app…
Explaining the physics of transfer learning a data-driven subgrid-scale closure to a different turbulent flow
Adam Subel, Yifei Guan, Ashesh Chattopadhyay +1
Transfer learning (TL) is becoming a powerful tool in scientific applications of neural networks (NNs), such as weather/climate prediction and turbulence modeling. TL enables out-o…
Learning physics-constrained subgrid-scale closures in the small-data regime for stable and accurate LES
Yifei Guan, Adam Subel, Ashesh Chattopadhyay +1
We demonstrate how incorporating physics constraints into convolutional neural networks (CNNs) enables learning subgrid-scale (SGS) closures for stable and accurate large-eddy simu…
Chaotic electro-convection flow states of a dielectric liquid between two parallel electrodes
Qi Wang, Yifei Guan, Junyu Huang +1
The two-dimensional regular and chaotic electro-convective flow states of a dielectric liquid between two infinite parallel planar electrodes are investigated using a two-relaxatio…
Stable a posteriori LES of 2D turbulence using convolutional neural networks: Backscattering analysis and generalization to higher Re via transfer learning
Yifei Guan, Ashesh Chattopadhyay, Adam Subel +1
There is a growing interest in developing data-driven subgrid-scale (SGS) models for large-eddy simulation (LES) using machine learning (ML). In a priori (offline) tests, some rece…
Data-driven subgrid-scale modeling of forced Burgers turbulence using deep learning with generalization to higher Reynolds numbers via transfer learning
Adam Subel, Ashesh Chattopadhyay, Yifei Guan +1
Developing data-driven subgrid-scale (SGS) models for large eddy simulations (LES) has received substantial attention recently. Despite some success, particularly in a priori (offl…
Sparse nonlinear models of chaotic electroconvection
Yifei Guan, Steven L. Brunton, Igor Novosselov
Convection is a fundamental fluid transport phenomenon, where the large-scale motion of a fluid is driven, for example, by a thermal gradient or an electric potential. Modeling con…
Limitation of Finite Difference Scheme in Electroconvection with Unipolar Charge Injection: A base-state Analysis
Yifei Guan, Junyu Huang, Jian Wu
The 1D hydrostatic base state of electroconvection driven by unipolar charge injection between two parallel electrodes is investigated using a finite difference method. A boundary…
Analytical Model for Electrohydrodynamic Thrust
Ravi Sankar Vaddi, Yifei Guan, Alexander Mamishev +1
Electrohydrodynamic (EHD) thrust is produced when ionized fluid is accelerated in an electric field due to the momentum transfer between the charged species and neutral molecules.…
Three-dimensional Electro-convective Vortices in Cross-flow
Yifei Guan, James Riley, Igor Novosselov
The study focuses on the 3D electro-hydrodynamic (EHD) instability for flow between to parallel electrodes with unipolar charge injection with and without cross-flow. Lattice Boltz…
Comparison of Analytical and Numerical Models for Point to Ring Electro-Hydrodynamic Flow
Yifei Guan, Ravi Sankar Vaddi, Alberto Aliseda +1
An electrohydrodynamic (EHD) flow in a point-to-ring corona configuration is investigated experimentally, analytically and via a multiphysics numerical model. The interaction betwe…
Experimental and Numerical Investigation of Corona Discharge Induced Flow on a Flat Plate
Ravi Sankar Vaddi, Yifei Guan, Zhi Yan Chen +2
Electrohydrodynamic (EHD) flow induced by planar corona discharge in the wall boundary layer region is investigated experimentally and via a multiphysics computational model. The E…
Behavior of Ultrafine Particles in Electro-Hydrodynamic Flow Induced by Corona Discharge
Ravi Sankar Vaddi, Yifei Guan, Igor Novosselov
Ultrafine particle behavior in electro-hydrodynamic (EHD) flow induced by corona discharge is studied experimentally and numerically. The EHD flow serves as a primary particle aspi…
Two Relaxation Time Lattice Boltzmann Method Coupled to Fast Fourier Transform Poisson Solver: Application to Electroconvective Flow
Yifei Guan, Igor Novosselov
Electroconvective flow between two infinitely long parallel electrodes is investigated via a multiphysics computational model. The model solves for spatiotemporal flow properties u…
Effect of Couette Flow on Electroconvective Vortices
Yifei Guan, Igor Novosselov
Numerical simulation of Electroconvective vortices behavior in the presence of Couette flow between two infinitely long electrodes is investigated. The two-relaxation-time Lattice…