Results 21 to 30 of about 4,829,865 (391)
Hybrid Laminar Flow Control Optimizations for Infinite Swept Wings
International Journal of Aerospace Engineering, 2023 Maintaining the laminar flow on surfaces through active control is a significantly promising technique for reducing fuel burn and alleviating environmental concerns in commercial aviation.
Yayun Shi, Xiayu Lan, Tihao Yang
doaj +1 more source
Frontiers in Bioengineering and Biotechnology, 2022 Background: Recent studies suggest that blood flow in main arteries is intrinsically disturbed, even under healthy conditions. Despite this, many computational fluid dynamics (CFD) analyses of aortic haemodynamics make the assumption of laminar flow, and
Emily Louise Manchester +5 more
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Fluorescence imaging of arterial blood spiral laminar flow of rats [PDF]
Jichu yixue yu linchuang, 2023 Objective To estatblish a real-time fluorescence imaging method for observing arterial blood spiral laminar flow. Methods Sprague Dawley rats were randomly divided into vein angiography group (femoral vein injection, 1 mL/kg) and low-dose arteriography ...
QI Xi, LI Bei, LI Hongyi, LI Yansong, ZHAO Lihao, HAO You, YU Xue
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Research Progress of the High-lift Device Design for Laminar Wing
Hangkong gongcheng jinzhan, 2021 The lift device design of laminar flow wing can reduce drag and noise.By combining the low resistance laminar flow area with the high-efficiency lift device and adopting the effective shape design and appropriate structure selection,the expansion of ...
LI Yunpeng, HAN Yongzhi
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Optimization of recirculating laminar air flow in operating room air conditioning systems
An International Journal of Optimization and Control: Theories & Applications, 2016 The laminar flow air-conditioning system with 100% fresh air is used in almost all operating rooms without discrimination in Turkey. The laminar flow device which is working with 100% fresh air should be absolutely used in Type 1A operating rooms ...
Enver Yalcin +3 more
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Optimizing the control of transition to turbulence using a Bayesian method [PDF]
, 2021 The nonlinear robustness of laminar plane Couette flow is considered under the action of in-phase spanwise wall oscillations by computing properties of the edge of chaos, i.e., the boundary of its basin of attraction. Three measures are used to quantify the chosen control strategy on laminar-to-turbulent transition: the kinetic energy of edge states ...
arxiv +1 more source
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
A mathematical clue to the separation phenomena on the two-dimensional Navier-Stokes equation [PDF]
, 2012 In general, before separating from a boundary, the flow moves toward reverse direction near the boundary against the laminar flow direction. Here in this paper, a clue to such reverse flow phenomena (in the mathematical sense) is observed. More precisely,
Yoneda, Tsuyoshi
core +2 more sources
Lagrangian analysis of the laminar flat plate boundary layer [PDF]
Phys. Fluids 28, 103604 (2016), 2016 The flow properties at the leading edge of a flat plate represent a singularity to the Blasius laminar boundary layer equations; by applying the Lagrangian approach the leading edge velocity profiles of the laminar boundary layer over a flat plate are studied.
arxiv +1 more source
On the Stability of Laminar Flows Between Plates [PDF]
Archive for Rational Mechanics and Analysis, 2021 Consider a two-dimensional laminar flow between two plates, so that $(x_1,x_2)\in {\mathbb R} \times[-1,1]$, given by ${\mathbf v}(x_1,x_2)=(U(x_2),0)$, where $U\in C^4([-1,1])$ satisfies $U^\prime\neq0$ in $[-1,1]$. We prove that the flow is linearly stable in the large Reynolds number limit, in two different cases: $\bullet$ $\sup_{x\in[-1,1]} |U"(x)|
Yaniv Almog, Bernard Helffer
openaire +4 more sources