Results 11 to 20 of about 733,937 (338)

Model-Based Fiber Diameter Determination Approach to Fine Particulate Matter Fraction (PM2.5) Removal in HVAC Systems

open access: yesApplied Sciences, 2021
Particulate Matter (PM) is a general term to classify air pollutants consisting of airborne particles. The particles vary in composition and size, and the sizes of particles range from 2.5 µm (PM2.5) to 10 µm (PM10).
Marlena Drąg
doaj   +1 more source

Investigation of a drag reduction on a circular cylinder in rotary oscillation [PDF]

open access: yes, 2001
Drag reduction in two-dimensional flow over a circular cylinder, achieved using rotary oscillation, was investigated with computational simulations. In the experiments of Tokumaru & Dimotakis (1991), this mechanism was observed to yield up to 80% drag ...
Leonard, A., Shiels, D.
core   +1 more source

Recent developments on manufacturing and characterization of fused quartz crucibles for monocrystalline silicon for photovoltaic applications

open access: yesOpen Ceramics, 2023
The dominating technology of solar cell production today is based on monocrystalline silicon, produced mostly by the Czochralski process. Recently, the solar cell industry, has started to move towards growing larger and better-performing ingots.
Gabriela Kazimiera Warden   +3 more
doaj   +1 more source

Passive Control of Base Pressure: A Review

open access: yesApplied Sciences, 2021
In the present world, passive control finds application in various areas like flow over blunt projectiles, missiles, supersonic parallel diffusers (for cruise correction), the engine of jets, static testbeds of rockets, the ports of internal combustion ...
Ambareen Khan   +2 more
doaj   +1 more source

Model-based electrospinning process design for nanofibers production

open access: yesITM Web of Conferences, 2018
The main concept of the electrospinning process modeling is to overcome difficulties associated with the experimental-based optimization procedure. Thus, 3-dimensional polynomial models were discussed in this work.
Drąg Marlena, Drąg Paweł
doaj   +1 more source

Drag enhancement and drag reduction in viscoelastic flow [PDF]

open access: yes, 2018
Creeping flow of polymeric fluid without inertia exhibits elastic instabilities and elastic turbulence accompanied by drag enhancement due to elastic stress produced by flow-stretched polymers.
Steinberg, Victor, Varshney, Atul
core   +4 more sources

Serve Ball Trajectory Characteristics of Different Volleyballs and Their Causes

open access: yesApplied Sciences, 2021
A floater serve in volleyball is a technique of serving a non-rotating or low-rotating ball, which is difficult to return because the flight path of the ball changes irregularly.
Takehiro Tamaru   +2 more
doaj   +1 more source

Semiclassical theory of electron drag in strong magnetic fields [PDF]

open access: yes, 2004
We present a semiclassical theory for electron drag between two parallel two-dimensional electron systems in a strong magnetic field, which provides a transparent picture of the most salient qualitative features of anomalous drag phenomena observed in ...
A. G. Rojo   +15 more
core   +1 more source

A Direct Optimization Algorithm for Problems with Differential-Algebraic Constraints: Application to Heat and Mass Transfer

open access: yesApplied Sciences, 2020
In this article, an optimization task with nonlinear differential-algebraic equations (DAEs) is considered. As a main result, a new solution procedure is designed. The computational procedure represents the sequential optimization approach.
Paweł Drąg
doaj   +1 more source

Jenny Offill’s Dept. of Speculation and the Revival of Fragmentary Writing

open access: yesMiscelánea: A Journal of English and American Studies, 2017
The last decade has seen a revival of interest in novels that follow a fragmentary structure. David Mitchell’s Cloud Atlas (2005), J. M. Coetzee’s Diary of a Bad Year (2007) and Richard McGuire’s graphic novel Here (2014) are among the most notable ...
Wojciech Drąg
doaj   +1 more source

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