Jones, Grace Ulan, Maria Liziniewicz, Mateusz Lindeberg, Johan Adamopoulos, Stergios
Birch has long suffered from a lack of active forest management, leading many researchers to use material without a detailed management history. Data collected from three birch (Betula pendula Roth, B. pubescens Ehrh.) sites in southern Sweden were analyzed using regression analysis to detect any trends or differences in wood properties that could ...
Benamar, Mohamed Amine
La Vélocimétrie Laser à effet Doppler (VLD) est un moyen de mesure non intrusif de la vitesse particulaire classiquement utilisé en mécanique des fluides. La vitesse acoustique est une grandeur très importante en acoustique car elle permet de caractériser les champs de propagation acoustique indispensable pour la compréhension de certains phénomène...
Wang, Miaomiao Li, Zhihui Shao, Xiaozhou
Published in
Arabian Journal of Geosciences
Knowledge of ultrasonic wave velocity and attenuation related with bedding orientations plays an important role for successful downhole, hydraulic fracturing, and surface seismic data interpretation. Real-time ultrasonic wave measurements in load direction have been conducted on Longmaxi shale specimens during compressive fractured process in this ...
Shakouri, Ali Farzay, Oveis Masihi, Mohsen Ghazanfari, M. H. Al-Ajmi, A. M.
Published in
SN Applied Sciences
One of the most common methods for determining elastic moduli of rocks is the acoustic velocity log. The elastic moduli of reservoir rocks are widely used in geomechanical modeling, borehole stability analysis, and hydraulic fracture design. In the carbonate reservoirs, the effect of the fluid type on the dynamic elastic modulus under high pressure...
shakouri, ali farzay, oveis masihi, mohsen ghazanfari, m. h. al-ajmi, a. m.
One of the most common methods for determining elastic moduli of rocks is the acoustic velocity log. The elastic moduli of reservoir rocks are widely used in geomechanical modeling, borehole stability analysis, and hydraulic fracture design. In the carbonate reservoirs, the effect of the fluid type on the dynamic elastic modulus under high pressure...
Murphy, Glen E. Moore, John R.
Published in
Annals of Forest Science
Key messageSegregating stands and logs based on internal wood properties is likely to lead to improvements in value for forest and mill owners, but some situations were found where no segregation was the best alternative. Where segregation was the best alternative, segregating logs at the landing, or stands based on pre-harvest inventory assessment...
Essien, Charles Via, Brian K. Gallagher, Thomas Mcdonald, Timothy Eckhardt, Lori
Published in
Journal of the Indian Academy of Wood Science
There are several types of acoustic tools commercially available for wood characterization, but they are generally classified into resonance and time-of-flight (ToF) tools. This classification is based upon the mode of velocity estimation for wood. In this study, we explored how the equilibrium moisture content of small clear wood samples (2.5 cm ×...
Gao, Shan Tao, Xinmin Wang, Xiping Wang, Lihai
Published in
Journal of Forestry Research
To investigate the effects of temperature and moisture content (MC) on acoustic wave velocity (AWV) in wood, the relationships between wood temperature, MC, and AWV were theoretically analyzed. According to the theoretical propagation characteristics of the acoustic waves in the wood mixture and the differences in velocity among various media (incl...
Meng, Qingsheng Liu, Shengbiao Jia, Yonggang Xiao, Zhiguang Wang, Xinzhi
Published in
Bulletin of Engineering Geology and the Environment
To understand the spatial characteristics of the acoustic velocity within sediments in the northern slope of the South China Sea, an ultrasonic technique was employed to measure the vertical and horizontal acoustic velocities of sediment core samples. Combined with the physical and mechanical properties test results of sediments, the relationships ...
Song, Hao Yi, Mingxu Huang, Jun Pan, Yalin Liu, Dawei
Published in
SpringerPlus
In this paper, the aerodynamic characteristic of a ducted tail rotor in hover has been numerically studied using CFD method. An analytical time domain formulation based on Ffowcs Williams–Hawkings (FW–H) equation is derived for the prediction of the acoustic velocity field and used as Neumann boundary condition on a rigid scattering surface. In ord...
