User profiles for "author:Andrew Buchan"

Andrew Buchan

Queen Mary University of London
Verified email at imperial.ac.uk
Cited by 1356

Non-linear model reduction for the Navier–Stokes equations using residual DEIM method

D Xiao, F Fang, AG Buchan, CC Pain, IM Navon… - Journal of …, 2014 - Elsevier
This article presents a new reduced order model based upon proper orthogonal
decomposition (POD) for solving the Navier–Stokes equations. The novelty of the method …

Non-intrusive reduced order modelling of the Navier–Stokes equations

D Xiao, F Fang, AG Buchan, CC Pain, IM Navon… - Computer Methods in …, 2015 - Elsevier
This article presents two new non-intrusive reduced order models based upon proper
orthogonal decomposition (POD) for solving the Navier–Stokes equations. The novelty of …

[HTML][HTML] Predicting airborne coronavirus inactivation by far-UVC in populated rooms using a high-fidelity coupled radiation-CFD model

AG Buchan, L Yang, KD Atkinson - Scientific reports, 2020 - nature.com
There are increased risks of contracting COVID-19 in hospitals and long-term care facilities,
particularly for vulnerable groups. In these environments aerosolised coronavirus released …

A POD reduced order model for resolving angular direction in neutron/photon transport problems

AG Buchan, AA Calloo, MG Goffin, S Dargaville… - Journal of …, 2015 - Elsevier
This article presents the first Reduced Order Model (ROM) that efficiently resolves the
angular dimension of the time independent, mono-energetic Boltzmann Transport Equation …

A Haar wavelet method for angularly discretising the Boltzmann transport equation

BJ Adigun, AG Buchan, A Adam, S Dargaville… - Progress in Nuclear …, 2018 - Elsevier
A novel, hierarchical Haar wavelet basis is introduced and used to discretise the angular
dimension of the Boltzmann transport equation. This is used in conjunction with a finite …

Bayesian constraints on the origin and geology of exoplanetary material using a population of externally polluted white dwarfs

JHD Harrison, A Bonsor, M Kama… - Monthly Notices of …, 2021 - academic.oup.com
White dwarfs that have accreted planetary bodies are a powerful probe of the bulk
composition of exoplanetary material. In this paper, we present a Bayesian model to explain …

Rapid formation of exoplanetesimals revealed by white dwarfs

A Bonsor, T Lichtenberg, J Dra̧żkowska… - Nature …, 2023 - nature.com
The timing of formation of the first planetesimals determines the mode of planetary accretion
and their geophysical and compositional evolution. Astronomical observations of …

[HTML][HTML] Inactivation rates for airborne human coronavirus by low doses of 222 nm far-UVC radiation

D Welch, M Buonanno, AG Buchan, L Yang… - Viruses, 2022 - mdpi.com
Recent research using UV radiation with wavelengths in the 200–235 nm range, often
referred to as far-UVC, suggests that the minimal health hazard associated with these …

Planets or asteroids? A geochemical method to constrain the masses of White Dwarf pollutants

AM Buchan, A Bonsor, O Shorttle… - Monthly Notices of …, 2022 - academic.oup.com
Polluted white dwarfs that have accreted planetary material provide a unique opportunity to
probe the geology of exoplanetary systems. However, the nature of the bodies that pollute …

Asynchronous accretion can mimic diverse white dwarf pollutants II: water content

MG Brouwers, AM Buchan, A Bonsor… - Monthly Notices of …, 2023 - academic.oup.com
Volatiles, notably water, are key to the habitability of rocky planets. The presence of water in
planetary material can be inferred from the atmospheric oxygen abundances of polluted …