The applications of information technology as a continuous process of monitoring the various ocean parameters such as salinity, temperature, the number of waves, the movement of fish, soil and turbidity. However, there is a sporadic attempt in assessing the wave heights which is one of the important parameters to project the roughness of the sea and the smoothness of the sea bed. Once a boat ma...

Surface roughness of laser powder bed fusion (L-PBF) printed overhang regions is a major contributor to deteriorated shape accuracy/surface quality. This study investigates the mechanisms behind evolution surface (Ra) in regions. The morphology result combination border track contour, adhesion, warp deformation, and dross formation, which strongly related angle (?). When 0° ? ? 15°, does not af...

optimization of process parameter is one of the ideal goals in laser sintering. the results of this process were measured as output parameters like: density, micro hardening, macro hardening, tension, roughness, stiffness, balling. in this paper, the influence of input parameter such as laser power, scan speed, material powder and etc are surveyed on output parameter like balling affection and ...

in this study, a method which is based on the integration of navier-stokes and continuity equations has been used to develop the governing equations. in these equations the coriolis acceleration and the effect of wind also have been considered. the main application of the model is to solve two dimensional problems with free surface in the plane. the offshore engineering projects and the hydrody...

Free-surface flows through a staggered cylinder array were investigated in an open-channel flume. The cylinders simulated rigid emergent vegetation. Specifically, we studied four flow cases with two-factor design comprising rate (7 and 13 l s−1) bed-surface state (hydraulically rough smooth). We have primarily assessed the effects of bed roughness shallowness on time-averaged structure transver...

Recently, high-entropy alloys (HEAs) have attracted much attention because of their superior properties, such as high strength and corrosion resistance. This study aimed to investigate the influences process parameters on microstructure mechanical properties CoCrFe NiTiMo HEAs using a laser-based powder bed fusion (LPBF) process. In terms laser power scan speed, map was constructed by evaluatin...

Seafloor topographic complexity is ecologically important because it provides habitat structure and alters boundary-layer flow over the bottom. Despite its importance, there is little agreement on how to define and measure surface complexity. The purpose of this investigation was to utilize fractal geometry of vertical cross-section profiles to characterize the surface topography of the soft-bo...

Most land surface models require information on aerodynamic roughness length and its temporal and spatial variability. This research presents a practical approach for determining the aerodynamic roughness length at fine temporal and spatial resolution over the landscape by combining remote sensing and ground measurements. The basic framework of Raupach, with the bulk surface parameters redefine...

Laser powder bed fusion (L-PBF) offers high degrees of freedom to create complex geometries with fine features. Controlling surface roughness is one the means improving mechanical and functional properties. This critical for those surfaces that post-treatments cannot process. study investigated effects a wide range processing parameters grouped by energy density on roughness, particularly at ve...

The aim of this work is to understand the granular behavior metal powder during spreading phase LBM process in order study effect properties and parameters on quality layer deposited before laser fusion. This a numerical performed with simulations based discrete element method where each grain simulated. model takes into account different interactions such as repulsion, dissipation, friction ad...