Results 61 to 70 of about 4,765,914 (397)

Quantitative Analysis of Drag Reduction Methods for Blunt Shaped Automobiles

open access: yesApplied Sciences, 2020
In fluid mechanics, drag related problems aim to reduce fuel consumption. This paper is intended to provide guidance for drag reduction applications on cars.
Ferenc Szodrai
doaj   +1 more source

A Periodically Rotating Distributed Forcing of Flow over a Sphere for Drag Reduction

open access: yesMathematics, 2023
In the present study, we propose a periodically rotating distributed forcing for turbulent flow over a sphere for its drag reduction. The blowing/suction forcing is applied on a finite slot of the sphere surface near the flow separation, and unsteady ...
Donggun Son, Jungil Lee
doaj   +1 more source

Frictional drag reduction by bubble injection in turbulent boundary layers: Experiment with long model ship and full-scale estimation

open access: yesNihon Kikai Gakkai ronbunshu, 2022
Drag reduction by bubble injection in turbulent boundary layers was investigated using a 36-m-long flat-bottom model ship. The model ship was towed at 8.0 m/s, resulting in a downstream-distance-based Reynolds number as high as 2.9 × 108.
Taiji TANAKA   +5 more
doaj   +1 more source

Navigating new norms: a systematic review of factors for the development of effective digital tools in higher education

open access: yesFEBS Open Bio, EarlyView.
What factors make for an effective digital learning tool in Higher Education? This systematic review identifies elements of a digital tool that published examples reveal to be features of an engaging and impactful digital tool. A systematic literature search yielded 25 research papers for analysis.
Akmal Arzeman   +4 more
wiley   +1 more source

Numerical simulation study on the drag reduction characteristics of grooves-microbubbles coupling surfaces

open access: yesInternational Journal of Metrology and Quality Engineering
Surface drag reduction technologies can significantly reduce the resistance during ship navigation, enhancing speed, efficiency and adaptability under various operating conditions.
Li Tianjian   +5 more
doaj   +1 more source

Numerical Study on Drag Reduction of Superhydrophobic Surfaces with Conical Microstructures in Laminar Flow [PDF]

open access: yesJournal of Applied Fluid Mechanics
Superhydrophobic surfaces have garnered attention for their ability to decrease fluid resistance, which can significantly reduce energy consumption. This study aims to accurately capture critical flow phenomena in a microchannel and explore the internal ...
Y. Xu, C. Ruan, Z. Zhang
doaj   +1 more source

Exploring Patients’ Profiles Associated With the Resolution of Acute Calcium Pyrophosphate Arthritis Treated With Colchicine and Prednisone: Post Hoc Analysis of a Randomized Controlled Trial

open access: yesArthritis Care &Research, EarlyView.
Objective The objective was to identify factors determining acute arthritis resolution and safety with colchicine and prednisone in acute calcium pyrophosphate (CPP) crystal arthritis. Methods We conducted a post hoc analysis of the COLCHICORT trial, which compared colchicine and prednisone for the treatment of acute CPP crystal arthritis, using a ...
Tristan Pascart   +14 more
wiley   +1 more source

Theory of Concentration Dependence in Drag Reduction by Polymers and of the MDR asymptote

open access: yes, 2003
A simple model of the effect of polymer concentration on the amount of drag reduction in turbulence is presented, simulated and analyzed. The qualitative phase diagram of drag coefficient vs.
E. de Angelis   +8 more
core   +1 more source

New Onset of Fibromyalgia After Exposure to a Combat Environment: A Longitudinal Cohort Study

open access: yesArthritis Care &Research, Accepted Article.
Objective Traumatic life events are hypothesized to be triggers for the onset of fibromyalgia. Posttraumatic stress disorder (PTSD) is a common comorbidity of fibromyalgia. However, limited prospective data are available on the development of fibromyalgia after exposure to high magnitude stress.
Jay B. Higgs   +15 more
wiley   +1 more source

Review on Drag Reduction and Its Heat Transfer by Additives

open access: yesAdvances in Mechanical Engineering, 2011
Since its discovery more than 60 years ago, the drag reduction phenomenon has achieved many notable energy saving effects. These achievements have encouraged researchers to study drag reduction further and further so that it can be utilized better.
Yi Wang   +3 more
doaj   +1 more source

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