this paper presents a numerical study of local mass transfer coefficients in a 90° bend using the rng version of k–e model to include the influence of curvature on the turbulent transport. simulations were performed for flow through a 90°, 3-d bend for reynolds numbers of 13500, 90000, and 390000, schmidt numbers of 2.53 and 700 and curvature ratios of 1.5, 2, and 2.5. the differences between t...

After the formation of bend ice cover, thickness is not uniformly distributed, and an open-water area usually formed downstream bend. The spatial temporal variation in seven cross sections was determined via Unmanned Aerial Vehicle Ground Penetrating Radar (UAV-GPR) technology traditional borehole measurements. plane morphology change open water observed by Sentinel-2. results show that average...

In the present research, the laminar forced convective heat transfer and fluid flow characteristics for Al2O3-water nanofluid flowing in different bend (i.e., 180o and 90o) pipes have been investigated numerically in a three-dimensional computational domain using the finite volume technique. The effects of different pertinent parameters, such as the Reynolds number of the duct, volume fraction ...

• Based on analysis of hydrologic data, dendrochronologic data, historic channel mapping, and aerial photography riparian recruitment appears to occur approximately once per decade in the post-regulation period. A comparison to stands that recruited in the pre-regulation period is needed to quantify differences between pre and post regulation period temporal and spatial characteristics of ripar...

Riverbank erosion is a major concern in all parts of the world due to its extensive impacts geomorphologically and economically. This study aims quantify rates riverbank Pusu River using pins method. Two sections river were selected namely site A B where straight section while situated on outside bend. 21 installed at each grid pattern. Measurement exposure taken from February 2019 April 2019. ...

In this paper the laminar flow in the rectangular channel bends is simulated using numerical techniques. The turning angle of the channel bend and the area ratio of the channel cross-section are two important parameters to be examined. For flow simulation, the body fitted 3-D continuity and momentum equations are used and a body fitted general purpose code is developed. The existing results of ...

In this paper the laminar flow in the rectangular channel bends is simulated using numerical techniques. The turning angle of the channel bend and the area ratio of the channel cross-section are two important parameters to be examined. For flow simulation, the body fitted 3-D continuity and momentum equations are used and a body fitted general purpose code is developed. The existing results of ...