Fracture roughness effects on slickwater proppant slurry settling attenuation

2021 ◽  
Author(s):  
Brian D. Yamashiro ◽  
Ingrid Tomac
Keyword(s):  
Roughness Effects ◽  
Fracture Roughness

Wall Roughness Effects on Combustion Development in Confined Supersonic Flow

2021 ◽  
Vol 37 (1) ◽  
pp. 151-166
Author(s):  
Guillaume Pelletier ◽  
Marc Ferrier ◽  
Axel Vincent-Randonnier ◽  
Vladimir Sabelnikov ◽  
Arnaud Mura
Keyword(s):  
Supersonic Flow ◽  
Wall Roughness ◽  
Roughness Effects

scholarly journals Numerical Parametric Study on the Effectiveness of the Contact-Point Response of a Stationary Vehicle for Bridge Health Monitoring

2021 ◽  
Vol 11 (15) ◽  
pp. 7028
Author(s):  
Ibrahim Hashlamon ◽  
Ehsan Nikbakht ◽  
Ameen Topa ◽  
Ahmed Elhattab
Keyword(s):  
Numerical Model ◽  
Health Monitoring ◽  
Contact Point ◽  
Response Spectra ◽  
Roughness Effects ◽  
Moving Vehicle ◽  
Bridge Health Monitoring ◽  
Vehicle Response ◽  
Instrumented Vehicle ◽  
The Time Domain

Indirect bridge health monitoring is conducted by running an instrumented vehicle over a bridge, where the vehicle serves as a source of excitation and as a signal receiver; however, it is also important to investigate the response of the instrumented vehicle while it is in a stationary position while the bridge is excited by other source of excitation. In this paper, a numerical model of a stationary vehicle parked on a bridge excited by another moving vehicle is developed. Both stationary and moving vehicles are modeled as spring–mass single-degree-of-freedom systems. The bridges are simply supported and are modeled as 1D beam elements. It is known that the stationary vehicle response is different from the true bridge response at the same location. This paper investigates the effectiveness of contact-point response in reflecting the true response of the bridge. The stationary vehicle response is obtained from the numerical model, and its contact-point response is calculated by MATLAB. The contact-point response of the stationary vehicle is investigated under various conditions. These conditions include different vehicle frequencies, damped and undamped conditions, different locations of the stationary vehicle, road roughness effects, different moving vehicle speeds and masses, and a longer span for the bridge. In the time domain, the discrepancy of the stationary vehicle response with the true bridge response is clear, while the contact-point response agrees well with the true bridge response. The contact-point response could detect the first, second, and third modes of frequency clearly, unlike the stationary vehicle response spectra.

scholarly journals Roughness effects on scalar transport

2020 ◽  
Vol 5 (11) ◽  
Author(s):  
Zvi Hantsis ◽  
Ugo Piomelli
Keyword(s):  
Scalar Transport ◽  
Roughness Effects

Parameters controlling roughness effects in a separating boundary layer

2004 ◽  
Vol 25 (3) ◽  
pp. 444-450 ◽  
Author(s):  
Carolyn D. Aubertine ◽  
John K. Eaton ◽  
Simon Song
Keyword(s):  
Boundary Layer ◽  
Roughness Effects

Surface roughness effects on the reinforcement of cement mortars through 3D printed metallic fibers

2016 ◽  
Vol 99 ◽  
pp. 305-311 ◽  
Author(s):  
Ilenia Farina ◽  
Francesco Fabbrocino ◽  
Francesco Colangelo ◽  
Luciano Feo ◽  
Fernando Fraternali
Keyword(s):  
Surface Roughness ◽  
Roughness Effects ◽  
Cement Mortars ◽  
3D Printed ◽  
Metallic Fibers
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