Results 21 to 30 of about 20,769,954 (368)
A fundamental limit on energy savings in controlled channel flow, and how to beat it [PDF]
Journal of Fluid Mechanics, Vol. 954, R3 (2023), 2022 We derive a limit on energy savings in controlled channel flow. For flow in a channel driven by pressure, shear, or any combination of the two, and controlled via wall transpiration or spanwise wall motion, the uncontrolled laminar state requires the least net energy (accounting for the energetic cost of control).
arxiv +1 more source
Applying deep reinforcement learning to active flow control in weakly turbulent conditions
The Physics of Fluids, 2020 Machine learning has recently become a promising technique in fluid mechanics, especially for active flow control (AFC) applications. A recent work [J. Fluid Mech. (2019), vol. 865, pp.
Feng Ren, J. Rabault, Hui Tang
semanticscholar +1 more source
Applied Sciences, 2022 In this work, a novel multi-objective efficient global optimization (EGO) algorithm, namely GMOEGO, is presented by proposing an approach of available threads’ multi-objective infill criterion.
Shengguan Xu +6 more
doaj +1 more source
Deep model predictive flow control with limited sensor data and online learning
Theoretical and Computational Fluid Dynamics, 2020 The control of complex systems is of critical importance in many branches of science, engineering, and industry, many of which are governed by nonlinear partial differential equations. Controlling an unsteady fluid flow is particularly important, as flow
Katharina Bieker +4 more
semanticscholar +1 more source
Comparison of gap-based and flow-based control strategies using a new controlled stochastic cellular automaton model for traffic flow [PDF]
, 2023 Autonomous vehicles are essential to future transportation systems, potentially reducing traffic congestion. This study examines the impact of different vehicle control strategies on traffic flow through simulations. We propose a novel stochastic cellular automaton model, the controlled stochastic optimal velocity (CSOV) model, which incorporates ...
arxiv +1 more source
Chain recurrence and Selgrade`s theorem for affine flows [PDF]
Journal of Dynamics and Differential Equations (2024), 2023 Affine flows on vector bundles with chain transitive base flow are lifted to linear flows and the decomposition into exponentially separated subbundles provided by Selgrade's theorem is determined. The results are illustrated by an application to affine control systems with bounded control range.
arxiv +1 more source
[Proceedings] IEEE INFOCOM '92: The Conference on Computer Communications, 1992 The problem of allocating network resources to the users of an integrated services network is investigated in the context of rate based flow control. The authors propose the use of a packet service discipline at the nodes of the network that is based on ...
Abhay K. Parekh, R. Gallager
semanticscholar +1 more source
An Optimized Pressure-Based Method for Thrust Vectoring Angle Estimation
Aerospace, 2023 This research developed a pressure-based thrust vectoring angle estimation method for fluidic thrust vectoring nozzles. This method can accurately estimate the real-time in-flight thrust vectoring angle using only wall pressure information on the inner ...
Nanxing Shi +5 more
doaj +1 more source
Ultrasound Flow-Monitoring and Flow-Metering of Air–Oil–Water Three-Layer Pipe Flows
IEEE Access, 2017 The combined use of ultrasound pulse-echo intensity and Doppler shift frequency is examined as a means to measure strong unsteady three-phase pipe flows of a gas and two liquids.
Junpei Hitomi +3 more
doaj +1 more source
AIP Advances, 2023 Previous attempts at active flutter suppression have been based on driving the deflection of multiple pairs of discontinuous mechanical control surfaces.
Zhen Chen +4 more
doaj +1 more source