Direct numerical simulations are employed to investigate the effects of discrete suction orifices at the wall on the disturbance evolution in laminar three-dimensional boundary-layer flows with favourable pressure gradient. Suction panels with many suction orifices can excite unstable crossflow (CF) modes even if the orifice spacing is smaller than the chordwise/spanwise wavelengths of unstable...

Understanding mechanical interactions at the root-soil interface is essential to predict erosion of vegetated slopes. Recently, shear strength vegetatedil under changing hydraulic conditions has been measured and modeled; however, interfaces have not investigated conditions. This paper proposes (1) a novel pullout apparatus measure suction, (2) Mohr-Coulomb-Vilar (MCV) model interfaces, (3) num...

abstract background: most of the patients admitted in the intensive care units (icus) require an endotracheal tube and mechanical ventilation. in order to clear and maintain patency of the airways, endotracheal suctioning is required. therefore, the least detrimental way of endotracheal tube suctioning which can diminish the complications should be selected. the present study aimed to compare t...

the effect of a combined system of the bed suction and jet injection as a pier-scour countermeasure on the turbulent flow field is studied in a laboratory flume using an acoustic doppler velocimeter (adv). the three components of the velocities in the vertical symmetry plane in the equilibrium scour hole in front and rear of the pier under 3-jet injections and bed suction rate qs/q0 = 2%located...

Soil suction–based analyses are paramount to proper design of foundations in expansive soils, yet availability field soil suction profiles from direct measurement is limited. A method was developed, using directly measured obtained sites across the US, by which routine geotechnical tests can be used estimate expand database for estimation profiles. Herein, expanded develop best-estimate clay en...

Despite almost 50 years of research on the functional morphology and biomechanics of suction feeding, no consensus has emerged on how to characterize suction-feeding performance, or its morphological basis. We argue that this lack of unity in the literature is due to an unusually indirect and complex linkage between the muscle contractions that power suction feeding, the skeletal movements that...