Search Results - "Juniper, P."

Sensitivity and Nonlinearity of Thermoacoustic Oscillations by Juniper, Matthew P, Sujith, R.I

“…Nine decades of rocket engine and gas turbine development have shown that thermoacoustic oscillations are difficult to predict but can usually be eliminated…”
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Self-organized dynamics and the transition to turbulence of confined active nematics by Opathalage, Achini, Norton, Michael M., Juniper, Michael P. N., Langeslay, Blake, Aghvami, S. Ali, Fraden, Seth, Dogic, Zvonimir

“…We study how confinement transforms the chaotic dynamics of bulk microtubule-based active nematics into regular spatiotemporal patterns. For weak confinements…”
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Applications of the dynamic mode decomposition by Schmid, P. J., Li, L., Juniper, M. P., Pust, O.

“…The decomposition of experimental data into dynamic modes using a data-based algorithm is applied to Schlieren snapshots of a helium jet and to time-resolved…”
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Nonlinear dynamics of a self-excited thermoacoustic system subjected to acoustic forcing by Balusamy, Saravanan, Li, Larry K.B., Han, Zhiyi, Juniper, Matthew P., Hochgreb, Simone

“…We experimentally study the nonlinear dynamics of a self-excited thermoacoustic system subjected to acoustic forcing. Our aim is to relate these dynamics to…”
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Optimal experiment design with adjoint-accelerated Bayesian inference by Yoko, Matthew, Juniper, Matthew P.

“…We develop and demonstrate a computationally cheap framework to identify optimal experiments for Bayesian inference of physics-based models. We develop the…”
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Thermoacoustic stabilization of combustors with gradient-augmented Bayesian optimization and adjoint models by Sengupta, Ushnish, Juniper, Matthew P.

“…Bayesian optimization (BO) is a global optimization algorithm well-suited for multimodal functions that are costly to evaluate, e.g. quantities derived from…”
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Dynamic mode locking in a driven colloidal system: experiments and theory by Juniper, Michael P N, Zimmermann, Urs, Straube, Arthur V, Besseling, Rut, Aarts, Dirk G A L, Löwen, Hartmut, Dullens, Roel P A

“…In this article we examine the dynamics of a colloidal particle driven by a modulated force over a sinusoidal optical potential energy landscape. Coupling…”
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Physics-Informed Compressed Sensing for PC-MRI: An Inverse Navier-Stokes Problem by Kontogiannis, Alexandros, Juniper, Matthew P.

“…We formulate a physics-informed compressed sensing (PICS) method for the reconstruction of velocity fields from noisy and sparse phase-contrast magnetic…”
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Azimuthal instabilities in annular combustors: standing and spinning modes by Ghirardo, Giulio, Juniper, Matthew P.

“…This theoretical study investigates spinning and standing modes in azimuthally symmetric annular combustion chambers. Both modes are observed in experiments…”
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Seed Mass, Seedling Herbivory and the Reserve Effect in Tropical Rainforest Seedlings by Green, P. T., Juniper, P. A.

“…1. The seedlings of larger-seeded species typically perform better than those of smaller-seeded species in the face of a variety of hazards. One mechanism that…”
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Non-normality and nonlinearity in thermoacoustic instabilities by Sujith, RI, Juniper, MP, Schmid, PJ

“…Analysis of thermoacoustic instabilities were dominated by modal (eigenvalue) analysis for many decades. Recent progress in nonmodal stability analysis allows…”
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The effect of the flame phase on thermoacoustic instabilities by Ghirardo, Giulio, Juniper, Matthew P., Bothien, Mirko R.

“…This paper concerns the influence of the phase of the heat release response on thermoacoustic systems. We focus on one pair of degenerate azimuthal acoustic…”
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Combined state and parameter estimation in level-set methods by Yu, Hans, Juniper, Matthew P., Magri, Luca

“…Reduced-order models based on level-set methods are widely used tools to qualitatively capture and track the nonlinear dynamics of an interface. The aim of…”
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Linear stability and adjoint sensitivity analysis of thermoacoustic networks with premixed flames by Orchini, Alessandro, Juniper, Matthew P.

“…We analyse the linear response of laminar conical premixed flames modelled with the linearised front-track kinematic G-equation. We start by considering the…”
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Flow Simulations Including Iron Nanoparticle Nucleation, Growth and Evaporation for Floating Catalyst CNT Production by Filip K. A. Gökstorp, Matthew P. Juniper

“…We use a computational fluid dynamics model coupled with a particle dynamics model to simulate how catalyst nanoparticles nucleate, grow and evaporate over the…”
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Nonlinear thermoacoustics of ducted premixed flames: The influence of perturbation convection speed by Kashinath, Karthik, Hemchandra, Santosh, Juniper, Matthew P.

“…When a premixed flame is placed within a duct, acoustic waves induce velocity perturbations at the flame’s base. These travel down the flame, distorting its…”
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Adjoint-based sensitivity analysis of low-order thermoacoustic networks using a wave-based approach by Aguilar, José G., Magri, Luca, Juniper, Matthew P.

“…Strict pollutant emission regulations are pushing gas turbine manufacturers to develop devices that operate in lean conditions, with the downside that…”
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Investigations Into the Role of the Bremsstrahlung Conversion Target in the Self-Magnetic Pinch Radiographic Diode by Martin, P. N., Threadgold, J. R., Jones, A., McLean, J., Cooper, G. M., Webb, K., Jeffries, G., Juniper, P.

“…In order to understand the role of the Bremsstrahlung conversion target assembly of the self-magnetic pinch diode, an investigation is undertaken on the…”
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Nonlinear hydrodynamic and thermoacoustic oscillations of a bluff-body stabilised turbulent premixed flame by Lee, Chin Yik, Li, Larry Kin Bong, Juniper, Matthew P., Cant, Robert Stewart

“…Turbulent premixed flames often experience thermoacoustic instabilities when the combustion heat release rate is in phase with acoustic pressure fluctuations…”
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Microscopic dynamics of synchronization in driven colloids by Juniper, Michael P.N., Straube, Arthur V., Besseling, Rut, Aarts, Dirk G.A.L., Dullens, Roel P.A.

“…Synchronization of coupled oscillators has been scrutinized for over three centuries, from Huygens’ pendulum clocks to physiological rhythms. One such…”
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