A5043724136- Heat and Mass Transfer in Porous Media
- Nanofluid Flow and Heat Transfer
- SARS-CoV-2 detection and testing
- Lattice Boltzmann Simulation Studies
- Micro and Nano Robotics
- Heat Transfer and Optimization
- Algal biology and biofuel production
- Aerosol Filtration and Electrostatic Precipitation
- Viral gastroenteritis research and epidemiology
- Phase Change Materials Research
- COVID-19 diagnosis using AI
- Fluid Dynamics and Mixing
- Membrane Separation Technologies
- Heat Transfer Mechanisms
- Heat Transfer and Numerical Methods
- Epoxy Resin Curing Processes
- Mechanical Behavior of Composites
- Solar-Powered Water Purification Methods
- Spacecraft and Cryogenic Technologies
- Biosensors and Analytical Detection
- SARS-CoV-2 and COVID-19 Research
- Biocrusts and Microbial Ecology
- Belt Conveyor Systems Engineering
- Heat Transfer and Boiling Studies
- Geothermal Energy Systems and Applications
Western University
2016-2025
Trojan Technologies (Canada)
2015
Abstract Wastewater surveillance of coronavirus disease 2019 (COVID-19) commonly applies reverse transcription-quantitative polymerase chain reaction (RT-qPCR) to quantify severe acute respiratory syndrome 2 (SARS-CoV-2) RNA concentrations in wastewater over time. In most applications worldwide, maximal sensitivity and specificity RT-qPCR has been achieved, part, by monitoring two or more genomic loci SARS-CoV-2. Ontario, Canada, the provincial Surveillance Initiative reports average copies...
Abstract A numerical study has been undertaken to explore the details of forced convection heat transfer in finned aluminum foam sinks. Calculations are made using a finite-volume computational fluid dynamics (CFD) code that solves for flow and conjugate fluid/porous/solid domains. The results indicate unfinned blocks porous low convective due relatively effective thermal conductivity aluminum. addition fins sink significantly enhances with only moderate pressure drop penalty. enhancement is...
Abstract During the COVID-19 pandemic, Province of Ontario, Canada, launched a wastewater surveillance program to monitor SARS-CoV-2, inspired by early work and successful forecasts waves in city Ottawa, Ontario. This manuscript presents dataset from January 1, 2021, March 31, 2023, with RT-qPCR results for SARS-CoV-2 genes PMMoV 107 sites across all 34 public health units covering 72% province’s 26.2% Canada’s population. Sampling occurred 2–7 times weekly, including geographical...
The wastewater viral activity level (WVAL) was developed by the United States Centers for Disease Control and Prevention (US CDC) as a standardized metric to aggregate SARS-CoV-2 data, enabling assessment of infection levels trends at state/territorial, regional national scales. This approach also facilitates comparative analysis prevalence across regions. In this study, we evaluated graphical methods integrate WVAL into interpretable visualizations public health decision-making. Preliminary...
The emergence of COVID-19 in Canada has led to over 4.9 million cases and 59,000 deaths by May 2024. Traditional clinical surveillance metrics (hospital admissions laboratory-positive cases) were complemented with wastewater environmental monitoring (WEM) monitor SARS-CoV-2 incidence. However, challenges public health integration WEM persist due perceived limitations data quality, potentially driving inconsistent correlations variability lead times. This study investigates how factors like...
Drag reduction in turbulent channel flows has significant practical relevance for energy savings. Various methods have been proposed to reduce skin friction, including microscale surface modifications such as riblets or superhydrophobic surfaces. More recently, macroscale the form of longitudinal grooves shown drag laminar flows. The purpose this study is show that these also and quantify a function groove parameters. Results are obtained using computational fluid dynamics (CFD) simulations...
To simulate the heat transfer performance of devices incorporating high-conductivity porous materials, it is necessary to determine relevant effective properties close volume-averaged momentum and energy equations. In this work, we these by conducting direct simulations in an idealized spherical void phase geometry use results establish closure relations be employed a framework. equation, permeability as defined Darcy’s law well non-Darcy term, which characterizes departure from at higher...
Abstract A numerical model for computing fluid flow and heat transfer, under the assumption of local thermal nonequilibrium, is proposed use with general unstructured, nonorthogonal grids. This introduces novel interface conditions which are physically-reasoned ensure strong coupling between pressure velocity fields. Special attention given to approximation diffusive advective fluxes, forces in momentum equations, pressure–velocity coupling, gradient reconstruction at interfaces while...
Computational fluid dynamics (CFD) is used to simulate a bubble column reactor operating in the bubbly (homogenous) regime. The Euler-Euler two-fluid model, integrated with population balance model (PBM), adopted compute flow and size distribution (BSD). CFD-PBM validated against published experimental data for BSD, global gas holdup, oxygen mass transfer coefficient. sensitivity of respect specification boundary conditions coalescence/breakup models assessed. coalescence Prince Blanch...
Abstract Wastewater-based surveillance of SARS-CoV-2 RNA has been implemented at building, neighbourhood, and city levels throughout the world. Implementation strategies analysis methods differ, but they all aim to provide rapid reliable information about community COVID-19 health states. A viable sustainable network must not only timely trends, also for scalability as well accurate detection known or unknown emerging variants. Emergence variant concern Omicron in late Fall 2021 presented an...
A numerical study on the effect of thermal contact resistance and its impact performance finned aluminum foam heat sinks has been conducted. Calculations are based solution volume-averaged mass, momentum, energy equations under conditions local nonequilibrium using a finite-volume-based computational fluid dynamics code for conjugate fluid/porous/solid domains. Numerical results have obtained wide range resistances at porous-solid interfaces, up to limit an effectively infinite resistance....
Prediction of air flow in the human lung is great interest for many physiological applications. Recent advances modeling such flows using computational fluid dynamics have included development porous media-based approaches that consider small-scale airways and alveoli as a domain. This article presents derivation governing equations relevant to an alveolated duct based on theory volume-averaging well their closure. It shown momentum closure problem reduces steady-state which solved over...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Christopher T. DeGroot, Anthony G. Straatman; Towards a porous media model of the human lung. AIP Conf. Proc. 15 May 2012; 1453 (1): 69–74. https://doi.org/10.1063/1.4711155 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Dropdown...
A key issue with wearable technology today is the popular use of stiff electrical motors to actuate joints. Although their performance ideal in terms power, bandwidth, accuracy, and speed, they do not have inherent ability replicate many biological properties. This includes modulate compliance, produce linear actuation, provide high power-to-weight ratios. The solutions replicating these properties usually include complex mechanisms form gear boxes, parallel spring mechanisms, control...
Simulation of flow in the human lung is great practical interest as a means to study detailed patterns within airways for many physiological applications. While computational simulation techniques are quite mature, simulations particularly complicated due vast separation length scales between upper and alveoli. Many past studies have presented numerical results truncated airway trees, however, there significant difficulties connecting such with respiratory models. This article presents new...
Characterizing the resistance of mesh filters, in terms pressure drop as a function flow velocity, is an important part modeling any filtration process. Most commonly, filters are characterized experimentally, which can be costly and time-consuming. This motivates generalized numerical approach for characterizing based on through representative segment filter. There uncertainty, however, correct specification boundary conditions such that results small match overall behaviour In this work,...
Bubble formation and dissolution have a wide range of industrial applications, from the production beverages to foam manufacturing processes. The rate at which bubble expands or contracts has significant effect on these In current work, hydrodynamics an isolated expanding due mass transfer in pool supersaturated gas–liquid solution is investigated. complete scalar transportation equation (advection–diffusion) solved numerically. It observed that present model accurately predicted growth when...