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Chong Yan, Yibing Xu, Ruizhe Cao and Ying Piao
The very large eddy simulation (VLES) method was investigated for supersonic reacting flows in the present work. The advantages and characteristics of the VLES model and the widely used improved delayed detached eddy simulation (IDDES) method were reveal...
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Xinying Liu, Anna Abà, Pierluigi Capone, Leonardo Manfriani and Yongling Fu
A concept of a new energy management system synthesizing meteorological and orographic influences on airplane safety envelope was developed and implemented at the ZHAW Centre for Aviation. A corresponding flight simulation environment was built in a Rese...
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Said Alhaddad, Lynyrd de Wit, Robert Jan Labeur and Wim Uijttewaal
Breaching flow slides result in a turbidity current running over and directly interacting with the eroding, submarine slope surface, thereby promoting further sediment erosion. The investigation and understanding of this current are crucial, as it is the...
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Chungwook Sim, Sukanta Basu and Lance Manuel
Efficient spatial and temporal resolution of simulated inflow wind fields is important in order to represent wind turbine dynamics and derive load statistics for design. Using Fourier-based stochastic simulation of inflow turbulence, we first investigate...
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Zhou Shen, Beimeng Hu, Guozhan Li and Hongjun Zhang
The effects of the coolant pulsation and the plasma aerodynamic actuation (PAA) on the film cooling are herein explored via large eddy simulations. The electrohydrodynamic force derived from the PAA was solved through the phenomenological plasma model. T...
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Yueyun Hu, Congchuan Hu, Guangdong Liu, Xiaofang Shan, Qinli Deng, Zhigang Ren and Qianyu Tang
This paper studies the influence of different piloti rates (0%, 20%, 40%, 60%, 80%, 100%) on outdoor wind comfort for three building groups, i.e., determinant type, point type, and enclosure type. LES (Large Eddy Simulation) is used to simulate the wind ...
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Prateek Kumar Singh, Xiaonan Tang and Hamidreza Rahimi
Numerous sources of overtopping and flood events suggest different cross-sectional land characteristics of the river and urban river water systems. Multiple stages of floodplains in compound channels are viable in urban areas to facilitate bank slope sta...
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Kefu Wang, Yiqun Ao, Kai Zhao, Tao Zhou and Feng Li
Shaped cooling holes have received considerable attention in recent years due to their potential to improve heat transfer while minimizing pressure drop. In this study, the effects of lobe-shaped cooling holes on film cooling performance and turbulent fl...
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Cheng Zeng, Yimo Bai, Jie Zhou, Fei Qiu, Shaowei Ding, Yudie Hu and Lingling Wang
Floodplain vegetation is of great importance in velocity distribution and turbulent coherent structure within compound open channel flows. As the large eddy simulation (LES) technique can provide detailed instantaneous flow dynamics and coherent turbulen...
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Christer Fureby, Guillaume Sahut, Alessandro Ercole and Thommie Nilsson
Large Eddy Simulation (LES) has rapidly developed into a powerful computational methodology for fluid dynamic studies, between Reynolds-Averaged Navier?Stokes (RANS) and Direct Numerical Simulation (DNS) in both accuracy and cost. High-speed combustion a...
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Mohammad Khalid Hossen, Asokan Mulayath Variyath and Jahrul M. Alam
In large eddy simulation (LES) of turbulent flows, dynamic subgrid models would account for an average cascade of kinetic energy from the largest to the smallest scales of the flow. Yet, it is unclear which of the most critical dynamical processes can en...
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Zachary Robison and Andreas Gross
To better understand the wake effects at low Reynolds numbers, large-eddy simulations of a 50% reaction low-pressure turbine stage and a linear cascade with two different bar wake generators were carried out for a chord Reynolds number of 50,000. For the...
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Yuwei Cheng and Qian Chen
Turbulent mixing layers are canonical flow in nature and engineering, and deserve comprehensive studies under various conditions using different methods. In this paper, turbulent mixing layers are investigated using large eddy simulation and dynamic mode...
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David Lamidel, Guillaume Daviller, Michel Roger and Hélène Posson
A Large-Eddy Simulation of the tip leakage flow of a single airfoil is carried out. The configuration consists of a non-rotating, isolated airfoil between two horizontal plates with a gap of 10 mm between the tip of the airfoil and the lower plate. The M...
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Seung Il Baek and Joon Ahn
The effects of bulk flow pulsations on film cooling in gas turbine blades were investigated by conducting large eddy simulation (LES) and Reynolds-averaged Navier?Stokes simulation (RANS). The film cooling flow fields under 32 Hz pulsation in the mainstr...
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Tongsheng Wang, Tiezhi Sun, Cong Wang, Chang Xu and Yingjie Wei
Microbubble drag reduction has good application prospects. It operates by injecting a large number of bubbles with tiny diameters into a turbulent boundary layer. However, its mechanism is not yet fully understood. In this paper, the mechanisms of microb...
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Pavel Kholodov and Stéphane Moreau
Large Eddy Simulation is performed using the NASA Source Diagnostic Test turbofan at approach conditions (62% of the design speed). The simulation is performed in a periodic domain containing one fan blade (rotor-alone configuration). The aerodynamic and...
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Gokhan Kirkil and Ching-Long Lin
A high-resolution large eddy simulation (LES) of wind flow over the Oklahoma City downtown area was performed to explain the effect of the building height on wind flow over the city. Wind flow over cities is vital for pedestrian and traffic comfort as we...
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Theomar Neves, Gilberto Fisch and Siegfried Raasch
Using a high resolution model of Large Eddies Simulation (LES), named PALM from PArallel LES Model, a set of simulations were performed to understand how turbulence and convection behave in a pasture and forest sites in Amazonia during the dry and rainy ...
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Gergely Kristóf and Bálint Papp
While large eddy simulation has several advantages in microscale air pollutant dispersion modelling, the parametric investigation of geometries is not yet feasible because of its relatively high computational cost. By assuming an analogy between heat and...
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