Classification and computation of extreme events in turbulent combustion
M Hassanaly, V Raman - Progress in Energy and Combustion Science, 2021 - Elsevier
In the design of practical combustion systems, ensuring safety and reliability is an important
requirement. For instance, reliably avoiding lean blowout, flame flashback or inlet unstart is …
requirement. For instance, reliably avoiding lean blowout, flame flashback or inlet unstart is …
[HTML][HTML] Chaotic measures as an alternative to spectral measures for analysing turbulent flow
Turbulence has associated chaotic features. In the past couple of decades, there has been
growing interest in the study of these features as an alternative means of understanding …
growing interest in the study of these features as an alternative means of understanding …
Space-time adaptive model order reduction utilizing local low-dimensionality of flow field
T Misaka - Journal of Computational Physics, 2023 - Elsevier
The cost of unsteady flow simulations, such as large eddy simulations, has been increasing
because of the large number of mesh cells and the use of high-order numerical schemes. In …
because of the large number of mesh cells and the use of high-order numerical schemes. In …
Ensemble-LES analysis of perturbation response of turbulent partially-premixed flames
M Hassanaly, V Raman - Proceedings of the Combustion Institute, 2019 - Elsevier
The response to small perturbations of the Sandia CH 4/air flame series is studied using a
dynamical systems formulation. Here, the Sandia D and E turbulent partially-premixed …
dynamical systems formulation. Here, the Sandia D and E turbulent partially-premixed …
Lyapunov spectrum of forced homogeneous isotropic turbulent flows
M Hassanaly, V Raman - Physical Review Fluids, 2019 - APS
In order to better understand deviations from equilibrium in turbulent flows, it is meaningful to
characterize the dynamics rather than the statistics of turbulence. To this end, the Lyapunov …
characterize the dynamics rather than the statistics of turbulence. To this end, the Lyapunov …
A priori analysis of reduced description of dynamical systems using approximate inertial manifolds
The treatment of turbulent flows as finite-dimensional dynamical systems opens new paths
for modeling and development of reduced-order descriptions of such systems. For certain …
for modeling and development of reduced-order descriptions of such systems. For certain …
On the Application of Optimal Control Techniques to the Shadowing Approach for Time Averaged Sensitivity Analysis of Chaotic Systems
RE Gilbert, D Lasagna - SIAM Journal on Applied Dynamical Systems, 2024 - SIAM
Traditional sensitivity analysis methods fail for chaotic systems due to the unstable
characteristics of the linearized equations. To overcome these issues two methods have …
characteristics of the linearized equations. To overcome these issues two methods have …
Using approximate inertial manifold approach to model turbulent non-premixed combustion
The theory of inertial manifolds (IM) is used to develop reduced-order models of turbulent
combustion. In this approach, the dynamics of the system are tracked in a low-dimensional …
combustion. In this approach, the dynamics of the system are tracked in a low-dimensional …
Computational tools for data-poor problems in turbulent combustion
M Hassanaly, V Raman - AIAA Scitech 2019 Forum, 2019 - arc.aiaa.org
Computational modeling is undergoing a revolution due to the influx of data. In the field of
propulsion and energy conversion systems, data-driven modeling is beginning to emerge as …
propulsion and energy conversion systems, data-driven modeling is beginning to emerge as …
Extreme events in turbulent combustion
M Hassanaly - 2019 - deepblue.lib.umich.edu
The design of reliable combustors is a crucial aspect of propulsion and energy production
applications: a faulty engine could cost human lives and millions (if not billions) of dollars. In …
applications: a faulty engine could cost human lives and millions (if not billions) of dollars. In …