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Chapter
Drag Reduction Control in Turbulent Channel with a Spanwise Traveling Wave of Blowing and Suction
A spanwise traveling wave of blowing and suction method is applied to reduce the drag in a turbulent channel flow with \(Re_{\tau }=180\) ...
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Chapter
Modelling and Numerical Simulation for Flow Control
This study deals with numerical prediction through Improved-Delayed-Detached-Eddy Simulation of the separating-reattaching flow over a backward-facing step and the manipulated flow with harmonic actuation for ...
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Chapter and Conference Paper
On the Thresholds of Vortex Identification Methods
Several vortex identification methods along with a newly proposed \(\Omega \) method are examined in the Burgers vort...
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Chapter and Conference Paper
Research on Hypersonic Boundary-Layer Stability with High-Temperature Effects
High-temperature effects need to be considered for a better design of hypersonic and reentry vehicles. They affect both the boundary layer flow and its flow transition, whose primary stages can be investigate...
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Chapter and Conference Paper
Gas-Kinetic Scheme for Multiscale Turbulence Simulation
Based on the extended BGK equation, the gas-kinetic scheme (GKS) is developed for fine simulation of high-Reynolds-number turbulence. With the help of existing hybrid RANS/LES models to approximate the effecti...
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Chapter and Conference Paper
Numerical Simulations of the Flow Dynamics Past an Oscillating Rod-Airfoil Configuration
The rod-airfoil subjected to a forced oscillation was numerically studied using the Improved Delayed Detached Eddy Simulation (IDDES) method. The freestream flow Mach number is 0.21 and Reynolds number based o...
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Chapter and Conference Paper
Develo** Cost-Effective Data Rescue Schemes to Tackle Disk Failures in Data Centers
Ensuring the reliability of large-scale storage systems remains a challenge, especially when there are millions of disk drives deployed. Post-failure disk rebuild takes much longer time nowadays due to the eve...
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Chapter and Conference Paper
Improved Delayed Detached-Eddy Simulations of Actively Controlled Flow
In this study, Improved Delayed Detached-Eddy Simulations (IDDES) were conducted for active flow control with a harmonic actuation on a backward-facing step (BFS) and pulsed blowing on a NACA0015 airfoil for r...
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Chapter and Conference Paper
Kinematics and Singularity of a 4-DOF Parallel Mechanism with Passive Spherical Joints
This paper presents a 4-DOF (3T1R: three-translational and one rotational degrees of freedom) parallel mechanism with passive spherical joints, which has better stiffness than the other ones with just prismati...
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Chapter and Conference Paper
Simulations of Complex Turbulent Flows with RANS-LES Hybrid Approaches
Two advanced DES (detached eddy simulation) methods, delayed-DES (DDES) and improved-delayed DES (IDDES), are the two wide-used RANS-LES (Reynolds averaged Navier-Stokes and large eddy simulation) hybrid metho...
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Chapter and Conference Paper
Characterizing Workload of Web Applications on Virtualized Servers
With the ever increasing demands of cloud computing services, planning and management of cloud resources has become a more and more important issue which directed affects the resource utilization and SLA and c...
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Chapter and Conference Paper
Experimental Framework for Injecting Logic Errors in a Virtual Machine to Profile Applications for Soft Error Resilience
As the high performance computing (HPC) community continues to push for ever larger machines, reliability remains a serious obstacle. Further, as feature size and voltages decrease, the rate of transient soft ...
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Chapter and Conference Paper
Interfacing Boundary Conditions towards Zonal RANS/LES
An improvement of the Vortex Method proposed by Sergent [19] and Mathey et al. [14] is presented. The method can be used to generate inflow boundary conditions for a LES or instantaneous interfacing conditions in...
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Chapter and Conference Paper
Comparisons of Three Improved DES Methods on Unsteady Flows Past Tandem Cylinders
Three advanced DES-type models coupled with adaptive dissipation scheme, DDES-2003/2006 and IDDES, are applied to predict the unsteady flow past tandem cylinders. The main differences among them are the shield...
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Chapter and Conference Paper
Delayed-Detached-Eddy Simulation of Near-Stall Axial Compressor Flow with Varying Passage Numbers
For highly loaded compressor blades a significant improvement in performance prediction of hybrid RANS-LES methods compared to widely used RANS methods has been observed. The flow in an axial compressor close ...
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Chapter and Conference Paper
A Hybrid Anomaly Detection Framework in Cloud Computing Using One-Class and Two-Class Support Vector Machines
Modern production utility clouds contain thousands of computing and storage servers. Such a scale combined with ever-growing system complexity of their components and interactions, introduces a key challenge f...
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Chapter and Conference Paper
Unsteady Flow Around Two Tandem Cylinders Using Advanced Turbulence Modeling Method
Dissipation effect on the computation of the massive separation around tandem cylinders using delayed detached-eddy-simulation is investigated. One scheme is the upwind Roe with original dissipation and anothe...
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Chapter and Conference Paper
Study into Effects of Vortex Generators on a Supercritical Wing
Flows around vortex generators (VGs), which serve as one of the important flow control methods, are investigated by solving Reynolds-averaged Navier–Stokes (RANS) equations. The influences on the main flow of ...
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Chapter and Conference Paper
A New High-Order Multidimensional Scheme
A third-order accurate multidimensional gas-kinetic BGK scheme is constructed through the high-order expansion of the distribution function and the high-order reconstruction of conservative variables. With sev...
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Chapter and Conference Paper
Modeling Supersonic and Hypersonic Flow Transition over Three-Dimensional Bodies
In this study we propose a local-variable-based laminar-turbulence transition model that considers the effects of different instability modes existing in highspeed aerodynamic flows. This model is validated wi...
