Computational simulation of the wind-force on metal meshes (2007)
Sharifian, Ahmad, Buttsworth, David R., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
[Abstract]: Estimating the drag force on a metal mesh is important if the installed metal mesh area is large and wind speeds are moderate. Such a situation may arise if a metal mesh is used to...
Buttsworth, David R., Davison, C., McLeod, J. D., Strapp, J. W., Jacobs, Peter, McIntyre, Tim, ...
[Abstract]: A number of recent aircraft turbofan power failure events have been linked to ice accretion in the initial compressor stages while the aircraft is traversing the anvil region of storm...
A new internal combustion engine configuration: opposed pistons with crank offset (2007)
Malpress, R., Buttsworth, David R., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
[Abstract]: Theoretical and experimental performance results for a newinternal combustion engine configuration are presented in this paper. The engine is a piston ported, spark ignition petrol engine...
Computational simulation of the wind-force on metal meshes (2007)
Sharifian, Ahmad, Buttsworth, David R., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
[Abstract]: Estimating the drag force on a metal mesh is important if the installed metal mesh area is large and wind speeds are moderate. Such a situation may arise if a metal mesh is used to...
Buttsworth, David R., Davison, C., McLeod, J. D., Strapp, J. W., Jacobs, Peter, McIntyre, Tim, ...
[Abstract]: A number of recent aircraft turbofan power failure events have been linked to ice accretion in the initial compressor stages while the aircraft is traversing the anvil region of storm...
A new internal combustion engine configuration: opposed pistons with crank offset (2007)
Malpress, R., Buttsworth, David R., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
[Abstract]: Theoretical and experimental performance results for a newinternal combustion engine configuration are presented in this paper. The engine is a piston ported, spark ignition petrol engine...
A Perspective on Computational Aerothermodynamics at NASA (2007)
Gnoffo, Peter A., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, Mee, David, ...
The evolving role of computational aerothermodynamics (CA) within NASA over the past 20 years is reviewed. The paper highlights contributions to understanding the Space Shuttle pitching moment...
Microscale Combustion: Progress and Challenges (2007)
Chou, S. K., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, Mee, David, ...
Microcombustion-related research was mainly motivated by the development of micro heat engines to meet the demand for a new generation of micro power sources. Unlike conventional combustion, which...
Numerical Study of the Behaviour of Wall Shear Stress in Pulsatile Stenotic Flows (2007)
Ooi, A., Blackburn, H. M., Zhu, S., Lui , E., Tae, W., Jacobs, Peter, ...
This paper presents a numerical study of pulsatile flow through an axisymmetric stenosed artery. Numerical calculations of the incompressible Navier-Stokes equations were carried out in an...
Design and Calibration of a Facility for Film Cooling Research (2007)
Porter, J. S., Sargison, J. E., Henderson, A. D., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
An existing open circuit wind tunnel has been modified to incorporate a secondary supply loop to provide controlled flow conditions at the inlet to a film cooling hole model. The primary or crossflow...
Using CFD to improve the design of a circulating water channel (2007)
Pullinger, M. G., Sargison, J. E., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
Computational Fluid Dynamics (CFD) has been used as a design tool to investigate means of improving flow uniformity in the working section of a circulating water channel. The CFD model was based on a...
A Laboratory Combustor for Studies of Premixed Combustion Instability (2007)
Hield, P. A., Brear, M. J., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
Instability of premixed combustors has been a problem of considerable practical importance for several decades. This instability originates from a coupling between the flame’s heat release and the...
Al-Falahi, Amir, Yusoff, M. Z, Yusaf, T., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
The work of this paper is aimed to investigate the parameters that affect the performance of a short-duration hypersonic test facility that build at the Universiti Tenaga Nasional "UNITEN" in...
Computational Fluid Dynamics Modelling of Natural Convection in Copper Electrorefining (2007)
Leahy, M. J, Schwarz, M. P., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
A computational fluid dynamics (CFD) model of copper electrorefining is discussed. Copper electrorefining takes place in a rectangular geometry, with two electrodes opposing each other, and a source...
Saha, S. C., Lei, C., Patterson, J. C., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
The natural convection thermal boundary layer adjacent to an abruptly heated inclined flat plate is investigated through a scaling analysis and verified by numerical simulations. In general, the...
Saha, S. C., Lei, C., Patterson, J. C., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
An investigation of the natural convection boundary layer adjacent to an inclined semi-infinite plate subject to a temperature boundary condition which follows a ramp function up until some specified...
Lei, C., Armfield, S. W., Patterson, J. C. And, O’Neill, A., Jacobs, Peter, McIntyre, Tim, ...
This study is concerned with heat transfer by natural convection in a differentially heated square cavity. The purpose is to explore numerically the effects of the corner geometry and adiabatic...
Prediction of Aircraft Empennage Buffet Loads (2007)
Schmidt, S., Levinski, O., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
The flow around an F/A-18 aircraft at high angle-of-attack is modelled with the aim of predicting the bending moments of the vertical tail resulting from differential buffet pressures on either side...
Circulation signature of vortical structures in turbulent boundary layers (2007)
Gao, Q., Ortiz-Duenas, C., Longmire, E. K., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
The strength of vortical structures in a turbulent boundary layer is of interest in determining the generation and development of hairpin vortices. The dual-plane Particle Image Velocimetry (PIV)...
Accuracy of Circulation Estimation Schemes Applied to Discretised Velocity Field Data (2007)
Hassan, E. R., Lau, T. C. W., Kelso, R. M., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
Numerical experiments are conducted on the velocity field of the Oseen vortex to determine the effect of random errors in the velocity field on the circulation estimate. The circulation is estimated...
The Effect of a Uniform Cross-flow on the Circulation of Vortex Rings (2007)
Hassan, E. R., Kelso, R. M., Lanspeary, P. V., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
This paper describes observations and measurements of the effects of a uniform cross flow on the vorticity field and circulation of a laminar vortex ring ejected from an elevated pipe. From...
A Singularity-Avoiding Moving Least Squares Scheme for Two Dimensional Unstructured Meshes (2007)
Chenoweth, S. K. M., Soria, J., Ooi, A., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
Moving least squares interpolation schemes are in widespread use as a tool for numerical analysis on scattered data. In particular, they are often employed when solving partial differential equations...
On Discerning Dynamical Structure from the Once-Integrated Momentum Equation (2007)
Klewicki, J., Fife, P., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
A critical initial step in multiscale/singular perturbation-type studies of the mean flow structure of steady wall-bounded turbulent flows involves determining the appropriately reduced,...
Ahmadzadegan, A., Tadjfar, M., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
There are many approaches in determining the sound propagated from turbulent flows. Hybrid approaches, in which the turbulent noise source field is computed or modeled separately from the far-field...
Sound emission on bubble coalescence: imaging, acoustic and numerical experim (2007)
Manasseh, R., Riboux, G., Bui, A., Risso, F., Jacobs, Peter, McIntyre, Tim, ...
Laboratory and numerical experiments are presented on the emission of sound on bubble coalescence. The aim was to better understand the fluid-dynamical mechanisms leading to sound emission. Bubbles...
Upstream Influence of a Porous Screen on the Flow Field of a Free Jet (2007)
Neely, A.J., Young, J., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
This paper investigates the upstream influence of a range of transverse porous screen geometries on the flow fields of free jets. Infrared thermography was used to map the vertical distribution of...
Fukuyama, E., Hoshino, T., Iida, A., Brown, R. J., Jacobs, Peter, McIntyre, Tim, ...
Pressure Sensitive Paints (PSP) are one of the breakthrough technologies for the measurement of aerodynamic sound from automobiles. Potential problems in applying Pressure Sensitive Paints to...
Multi-camera digital holographic PIV: Tomographic DHPIV (2007)
Atkinson, C. H., Soria, J., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
The wide scale application of digital holographic particle image velocimetry (DHPIV) as a three-component three-dimensional (3C-3D) velocity field measurement tool is current restricted by the...
Algebraic Reconstruction Techniques for Tomographic Particle Image Velocimetry (2007)
Atkinson, C. H., Soria, J., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
Tomographic particle image velocimetry (Tomo-PIV) is a technique for three-component three-dimensional (3C-3D) velocity measurement based on the tomographic reconstruction of a volume intensity field...
High Speed Flow Control Using Microwave Energy Deposition (2007)
Knight, D. D., Kolesnichenko, Y. F., Brovkin, V., Khmara, D., Jacobs, Peter, McIntyre, Tim, ...
In recent years a variety of beamed energy deposition techniques have been investigated for flow control in high speed flows. Among these, microwave energy deposition has been demonstrated...
Udagawa, S., Garen, W., Meyerer, B., Maeno, K., Jacobs, Peter, McIntyre, Tim, ...
We have developed a small scale shock tube of 1mm diameter which has a diaphragm-less driver section. The experiment is performed by using our small scale shock tube, where the propagation velocities...
First Trace for Irregular Shock Wave Process in Weak Mach Reflection (2007)
Siegenthaler, A., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, Mee, David, ...
Referring to von Neumann's words, transition from a two- to a three-shock reflection configuration in the weak domain presents some very considerable theoretical difficulties. It nonetheless remains...
Study of Underexpanded Supersonic Jets with Optical Techniques (2007)
Mitchell, D., Honnery, D, Soria, J., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
An experimental investigation of underexpanded axissymmetric supersonic jets is presented. Particle Image Velocimetry is used to obtain quantitative measurements of the velocity field, while a high...
Mu M., Duan, W. S., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
In the stability, sensitivity and predictability studies in geophysical fluid dynamics, linear singular vector (LSV), which is the fastest growing perturbation of the linearized model, is one of the...
Verification of a Three Dimensional Advection Dispersion Model Using Dye Release Experiment (2007)
Mirfenderesk, H., Hughes, L., Tomlinson, R., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
The study aims to investigate transport processes within the entrance of a coastal lagoon through estimating the advectiondispersion coefficients of the estuary. To this end, an extensive...
Andrewartha, J. M., Sargison, J. E., Perkins, K. J., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
Gomphonema, a freshwater diatom, is currently being studied to determine its effect on the capacity of hydroelectric canals and the structure of turbulent boundary layers. Gomphonema is the primary...
Do we find hurricanes on other planets ? (2007)
Klimenko, A. Y., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, Mee, David, ...
Vortices with intense rotation occur in nature at very different scales, with the bathtub vortex representing one of the smallest and atmospheric vortices – tornadoes, mesocyclones and cyclones –...
Das, R., Cleary, P. W., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
An approach for modelling plastic deformation and thermal response in a weld pool using the mesh-free Smoothed Particle Hydrodynamics (SPH) method is developed. The proposed modelling technique is...
Numerical simulations of an evaporating bio-oil droplet (2007)
Brett, J. D., Ooi, A., Soria, J., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
Bio-oil is a promising alternative fuel which contains a wide range of chemical components, including high molecular mass, organic compounds and a significant amount of water. This chemical structure...
Experimental Investigations of the Effect of Reynolds Number on a Plane Jet (2007)
Deo, R. C., Mi, J., Nathan, G. J., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
The effect of Reynolds number, Re =Uo,cH /μ , where Uo,c is the nozzle exit centreline velocity, H is the slot-opening width and n is the kinematic viscosity of air) on the velocity field of a...
The development of turbulent pipe flow (2007)
Doherty, J., Ngan, P., Monty, J., Chong, M., Jacobs, Peter, McIntyre, Tim, ...
Whilst turbulence still remains one of the great mysteries of classical physics, its reputation for a chaotic lack of structure is under intense scrutiny. Research now points to the existence of...
Chao, D. A., Castillo, L., Turan, Ö. F., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
An experimental study was conducted to examine the effect of surface roughness on the development of an adverse pressure gradient turbulent boundary layer. Hot-wire anemometry measurements were...
Velocity Derivative Skewness in Isotropic Turbulence and its Measurement with Hot Wires (2007)
Burattini, P., Lavoie, P., Antonia, R. A., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
We investigate the effect of the hot wire resolution on measurements of the velocity derivative skewness in homogeneous isotropic turbulence. A single wire configuration (with different lengths and...
Experiments on Roll Waves in Air-Water Pipe Flow (2007)
De Leebeeck, A., Hoel Gaarder, A., Jørgen Nydal, O., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
Experiments on air-water two phase flow in inclined pipes have been made, with emphasis on the roll wave regime. The motivation for the work is the improving of 1D flow models for multiphase pipeline...
Development of Casbar: a Two-phase Flow Code for the Interior Ballistics Problem (2007)
Gollan, R. J., Johnston, I. A., O’Flaherty, B. T., Jacobs, P. A., Jacobs, Peter, McIntyre, Tim, ...
Accurate modelling of gun interior ballistic processes aids in the design and analysis of guns and their propelling charges. Presently, the most accurate modelling of the interior ballistics problem...
Analysis of Scramjet Flight Trajectories with Oxygen Enrichment (2007)
Razzaqi, S. A., Smart, M. K., Weidner, N., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
Scramjets are proposed as a second stage for a multi-stage access-to-space system. At present the upper limit of scramjet operation is expected to be Mach 12-14. Use of oxygen enrichment is a...
Numerical simulation of strong blast waves in high temperature turbulent flows (2007)
Ghosh, S., Mahesh, K., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
Numerical issues associated with simulating strong blast waves in high temperature flows in a turbulent background have been addressed effectively. Spherical energy deposition in both laminar and...
Rundström, D., Moshfegh, B., Ooi, A., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
The objective of this study is to compare the performance of the v 2 -f and the Reynolds Stress Model (RSM) turbulence model with a two-layer wall treatment for the prediction of the mean velocity...
Rundström, D., Moshfegh, B., Ooi, A., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
The objective of this study is to compare the performance of the v 2 -f and the Reynolds Stress Model (RSM) turbulence model with a two-layer wall treatment for the prediction of the mean velocity...
Effects of Spin on Tennis Ball Aerodynamics: An Experimental and Computational Study (2007)
Alam, F., Tio, W., Watkins, S., Subic, A., Naser, J., Jacobs, Peter, ...
The aerodynamic behaviour of a tennis ball is very complex and significantly differs from other sports balls due to its surface structures (fuzz, seam orientation etc). Relatively high rotational...
Flow Field Phenomena about Lift and Downforce Generating Cambered Aerofoils in Ground Effect (2007)
Vogt, J. W., Barber, T. J., Leonardi, E., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
ascertain and highlight the different ways in which ground effect phenomena are present around both an upright (lift generating) and inverted (downforce generating) cambered aerofoil when in close...
Using fluid mechanics for targeting genes and drugs to the skin for better vaccines (2007)
Kendall, M. A. F., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, Mee, David, ...
Millions of people die each year from infectious disease, and many more are affected by allergies. A major stumbling block to the full use of improved immunotherapies (e.g. vaccines) against these...
An Experimental Investigation of Perturbations on Vortex Breakdown over Delta Wings (2007)
Srigrarom, S., Ridzwan, M., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, Buttsworth, David, ...
An experimental investigation on vortex breakdown on delta wings at high angles of attack is presented. As suggested by previous works, perturbations are used to change the platform of the delta...
Wang, J., Tetlow, G. A., Lucey, A. D., Jacobs, Peter, McIntyre, Tim, Cleary, Matthew, ...
The present work seeks to elucidate the flow-structure dynamics of the upper airway so that improved clinical strategies for the alleviation of snoring and sleep apnoea can be developed and applied...
Effect of tear additives on the shear stress and normal stress acting on the ocular surface (2007)
Jones, M. B., Fulford, G. R., Please, C. P., McElwain, D. L. S., Collins, M. J., Jacobs, Peter, ...
Based on lubrication theory, an elastohydrodynamic model of the human tear film is presented. Using this model we investigate the effect altering the viscosity of the tears has on the stresses acting...
Computational Fluid Dynamics Investigation of a Cavity Micro-Bioreactor (2007)
Tan, W. L., Thouas, G. A., Thompson, M. C., Hourigan, K., Jacobs, Peter, McIntyre, Tim, ...
In this paper, cavity aspect ratios and fluid inflow velocities of an idealized perfusion cavity micro-bioreactor for embryos were examined using computational fluid dynamics simulations. Changes to...