151 citations · 537 across the 31 of their papers we have counts for
18 papers · 1 filter
A high-order diffused-interface approach for two-phase compressible flow simulations using a Discontinuous Galerkin framework
Niccolò Tonicello, Matthias Ihme
A diffused-interface approach based on the Allen-Cahn phase field equation is developed within a high-order Discontinuous Galerkin framework. The interface capturing technique is b…
A High-resolution Large-eddy Simulation Framework for Wildland Fire Predictions using TensorFlow
Qing Wang, Matthias Ihme, Rod R. Linn +6
As the impact of wildfires has become increasingly more severe over the last decades, there is continued pressure for improvements in our ability to predict wildland fire behavior…
Interpretable Data-driven Methods for Subgrid-scale Closure in LES for Transcritical LOX/GCH4 Combustion
Wai Tong Chung, Aashwin Ananda Mishra, Matthias Ihme
Many practical combustion systems such as those in rockets, gas turbines, and internal combustion engines operate under high pressures that surpass the thermodynamic critical limit…
Heat transfer augmentation by recombination reactions in turbulent reacting boundary layers at elevated pressures
Nikolaos Perakis, Oskar Haidn, Matthias Ihme
A study of a reacting boundary layer flow with heat transfer at conditions typical for configurations at elevated pressures has been performed using a set of direct numerical simul…
Requirements Towards Predictive Simulations of Turbulent Reacting Flows
Matthias Ihme
Significant progress has been made on the model development for simulating turbulent reacting flows. As a consequence, we are currently in a position where key-physical aspects of…
A General Drag Coefficient for Flow over a Sphere
Narendra Singh, Michael Kroells, Chenxi Li +4
A generalized physics-based expression for the drag coefficient of spherical particles moving in a fluid is derived. The proposed correlation incorporates essential rarefied physic…
Data-assisted combustion simulations with dynamic submodel assignment using random forests
Wai Tong Chung, Aashwin Ananda Mishra, Nikolaos Perakis +1
In this investigation, we outline a data-assisted approach that employs random forest classifiers for local and dynamic combustion submodel assignment in turbulent-combustion simul…
Transcritical Mixing and Auto-Ignition of n-dodecane Liquid Fuel using a Diffused Interface Method
Luis Bravo, Peter C. Ma, Matthias Ihme
High-fidelity simulations of transcritical spray mixing and auto ignition in a combustion chamber are performed at high pressure and temperature conditions using a recently develop…
Computational Modeling and Analysis of Diesel-fuel Injection and Autoignition at Transcritical Conditions
Matthias Ihme, Peter C. Ma, Luis Bravo
The need for improved engine efficiencies has motivated the development of high-pressure combustion systems, in which operating conditions achieve and exceed critical conditions. A…
Lyapunov exponent and Wasserstein metric as validation tools for assessing short-time dynamics and quantitative model evaluation of large-eddy simulation
Hao Wu, Peter C. Ma, Yu Lv +1
In this work, methods for the evaluation of LES-quality and LES-accuracy are presented, which include the Lyapunov exponent for the analysis of short-time predictability of LES-cal…
Numerical analysis on mixing processes for transcritical real-fluid simulations
Peter C. Ma, Hao Wu, Daniel T. Banuti +1
The accurate and robust simulation of transcritical real-fluid flows is crucial for many engineering applications. Diffused interface methods are frequently employed and several nu…
Direct numerical simulations of turbulent channel flow under transcritical conditions
Peter C. Ma, Xiang I. A. Yang, Matthias Ihme
Turbulent flows under transcritical conditions are present in regenerative cooling systems of rocker engines and extraction processes in chemical engineering. The turbulent flows a…
Application of Pareto-efficient combustion modeling framework to large eddy simulations of turbulent reacting flows
Hao Wu, Peter C. Ma, Thomas Jaravel +1
In the application of the combustion models based on low-dimensional manifolds (for instance flamelet models) to large-eddy simulation (LES) of reactive turbulent flows, the modeli…
Compositional inhomogeneities as a source of indirect combustion noise
Luca Magri, Jeff O'Brien, Matthias Ihme
The generation of indirect combustion noise by compositional inhomogeneities is examined theoretically. For this, the compact nozzle theory of~\cite{MARBLE_CANDEL_JSV1977} is exten…
Numerical methods to prevent pressure oscillations in transcritical flows
Peter C. Ma, Yu Lv, Matthias Ihme
The accurate and robust simulation of transcritical real-fluid effects is crucial for many engineering applications, such as fuel injection in internal combustion engines, rocket e…
Modeling and Simulation of Diesel Injection at Transcritical Conditions
Peter C. Ma, Matthias Ihme, Luis Bravo
The need for improved engine efficiencies has motivated the development of high-pressure combustion systems, in which operating conditions achieve and exceed critical conditions. A…
Numerical framework for transcritical real-fluid reacting flow simulations using the flamelet progress variable approach
Peter C. Ma, Daniel T. Banuti, Jean-Pierre Hickey +1
An extension to the classical FPV model is developed for transcritical real-fluid combustion simulations in the context of finite volume, fully compressible, explicit solvers. A do…
An SMLD joint PDF model for turbulent non-premixed combustion using the flamelet progress-variable approach
Alessandro Coclite, Giuseppe Pascazio, Pietro De Palma +2
This paper provides an improved flamelet/progress variable (FPV) model for the simulation of turbulent combustion, employing the statistically most likely distribution (SMLD) appro…