Volumetric emission tomography for combustion processes

SJ Grauer, K Mohri, T Yu, H Liu, W Cai - Progress in energy and …, 2023 - Elsevier
This is a comprehensive, critical, and pedagogical review of volumetric emission
tomography for combustion processes. Many flames that are of interest to scientists and …

Flow over an espresso cup: inferring 3-D velocity and pressure fields from tomographic background oriented Schlieren via physics-informed neural networks

S Cai, Z Wang, F Fuest, YJ Jeon, C Gray… - Journal of Fluid …, 2021 - cambridge.org
Tomographic background oriented Schlieren (Tomo-BOS) imaging measures density or
temperature fields in three dimensions using multiple camera BOS projections, and is …

Wavelet-based optical flow analysis for background-oriented schlieren image processing

BE Schmidt, MR Woike - AIAA Journal, 2021 - arc.aiaa.org
A wavelet-based optical flow analysis (wOFA) method for processing background-oriented
schlieren (BOS) images is presented and demonstrated on synthetic and experimental data …

Estimating density, velocity, and pressure fields in supersonic flows using physics-informed BOS

JP Molnar, L Venkatakrishnan, BE Schmidt… - Experiments in …, 2023 - Springer
We report a new workflow for background-oriented schlieren (BOS), termed “physics-
informed BOS,” to extract density, velocity, and pressure fields from a pair of reference and …

Assessment and application of optical flow in background-oriented schlieren for compressible flows

BO Cakir, S Lavagnoli, BH Saracoglu, C Fureby - Experiments in Fluids, 2023 - Springer
Optical flow provides an opportunity to elevate the resolution and sensitivity of deflection
sensing in background-oriented schlieren (BOS). Despite extensive relevant literature within …

Flow field tomography with uncertainty quantification using a Bayesian physics-informed neural network

JP Molnar, SJ Grauer - Measurement Science and Technology, 2022 - iopscience.iop.org
We report a new approach to flow field tomography that uses the Navier–Stokes and
advection–diffusion equations to regularize reconstructions. Tomography is increasingly …

Three-dimensional inhomogeneous temperature tomography of confined-space flame coupled with wall radiation effect by instantaneous light field

Z Niu, H Qi, B Gao, L Wei, Y Ren, M He… - International Journal of …, 2023 - Elsevier
Optical tomography has been demonstrated to be a powerful tool for the three-dimensional
(3D) measurement of the dynamic characteristics of turbulent flame. Many practical …

Acoustic tomography of temperature and velocity fields by using the radial basis function and alternating direction method of multipliers

J Zhang, H Qi, Y Ren, M Su, X Cai - International Journal of Heat and Mass …, 2022 - Elsevier
Considering the acoustic refraction effect, an investigation of simultaneously visualizing the
temperature and velocity fields is carried out by using the combined meshfree radial basis …

[HTML][HTML] Background oriented schlieren technique with fast Fourier demodulation for measuring large density-gradient fields of fluids

T Shimazaki, S Ichihara, Y Tagawa - Experimental Thermal and Fluid …, 2022 - Elsevier
In order to measure the large density-gradient fields of fluids such as underwater shock
waves, we employed a fast Fourier demodulation called Fast Checkerboard Demodulation …

Flow regimes and heat transfer mechanisms affecting supercritical transition in microchannels

TA Whitaker, JW Cochran, JD Hochhalter… - International Journal of …, 2024 - Elsevier
Supercritical carbon dioxide (sCO 2) exhibits unique thermophysical and transport
properties, which have the potential to enhance a wide range of thermal systems. Significant …