Viscous fluid exiting a long horizontal circular pipe develops complex structure comprising primary jet above and smaller secondary below with thin curtain connecting them. We present here combined experimental, theoretical numerical study of this 'Torricelli's curtain' phenomenon, focusing on the factors that control its morphology. propose model for in which particle trajectories result from ...

In this study, the numerical analysis of turbulent flow and heat transfer of double pulsating impinging jets on a flat surface has been investigated. The unsteady two-dimensional numerical solution for two similar and dissimilar jets was performed using the RNG k-ε model. The results showed that the RNG k-ε model has more satisfactory predictions of the Nusselt number distribution. Comparisons ...

Calibration equations for free-flowing radial gates typically provide sufficient accuracy for irrigation district operations. However, many water purveyors have difficulty in determining accurate discharges when the downstream water level begins to submerge the gate. Based on experimental laboratory studies, we have developed a new calibration method for free-flowing and submerged radial gates ...

Five titanium plasma-sprayed implants were biopsied from a human volunteer 6 months after placement. Four test implants had been placed in immediate extraction sockets, while one implant was placed in a mature site and served as a control. The histologic analysis demonstrated that all five implants achieved osseointegration as demonstrated by light microscopy, whereas a varying degree of bone-i...

This paper presents the characteristics of heave motion responses and hydrodynamic forces a horizontal floating circular cylinder during wave–current interaction. A two-dimensional numerical model based on CFD (Computational Fluid Dynamics) method for modeling wave flow is validated verified. The were calculated analyzed under conditions different k values (stiffness spring), amplitudes, submer...

This study presents an investigation on the use of submerged counterflow jets as a means for stabilizing spatial hydraulic jump occurring in abruptly expanding channels. The characteristics flow downstream from stilling basin and main parameters influencing effectiveness device improving uniformity reducing scouring potential are examined laboratory tests, under several geometric configurations...

The paper investigates the mean mass transfer/passive scalar spreading in turbulent submerged round jets. Two regions of flow are present jet evolution: Near-Field Region (NFR) and Fully Developed (FDR). This group research from some years evolution rectangular jets with new physical finding that two sub-regions (not a single one) NFR. first region is newly discovered Undisturbed Flow (URF), wh...