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Simulation of flow pattern at rectangular lateral intake with different dike and submerged vane scenarios

Water Science and Engineering 2017年第3期10卷 246-255页

作者： Hojat Karami Saeed Farzin mohammad tavakol sadrabadi Hasan Moazeni Faculty of Civil Engineering Semnan University School of Water Sciences Engineering Shahid Chamran University of Ahvaz

A comprehensive understanding of the sediment behavior at the entrance of diversion channels requires complete knowledge of threedimensional(3 D) flow behavior around such structures. Dikes and submerged vanes are typical structures used to control sediment entrainment in the diversion channel. In this study, a 3 D computational fluid dynamic(CFD) code was calibrated with experimental data and used to evaluate flow patterns, the diversion ratio of discharge, the strength of secondary flow, and dimensions of the vortex inside the channel in various dike and submerged vane installation scenarios. Results show that the diversion ratio of discharge in the diversion channel is dependent on the width of the flow separation plate in the main channel. A dike perpendicular to the flow with a narrowing ratio of 0.20 doubles the ratio of diverted discharge in addition to reducing suspended sediment input to the basin, compared with a no-dike situation, by creating the outer arch conditions. A further increase in the narrowing ratio decreases the diverted discharge. In addition, increasing the longitudinal distance between consecutive vanes(Ls) increases the velocity gradient between the vanes and leads to a more severe erosion of the bed, near the vanes.

关键词： Three-dimensional simulation Computational fluid dynamics Submerged vanes Dike Side and vortex flow

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Engineered hydrogels for brain tumor culture and therapy

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Bio-Design and Manufacturing 2020年第3期3卷 203-226页

作者： Jai Thakor Samad Ahadian Ali Niakan Ethan Banton Fatemeh Nasrollahi mohammad MHasani‑sadrabadi Ali Khademhosseini Center for Minimally Invasive Therapeutics(C‑MIT) University of California-Los Angeles570 Westwood PlazaLos AngelesCA 90095USA Department of Bioengineering University of California-Los AngelesLos AngelesCA 90095USA Department of Materials Science and Engineering University of California-Los AngelesLos AngelesCA 90095USA Weintraub Center for Reconstructive Biotechnology Division of Advanced ProsthodonticsSchool of DentistryUniversity of California-Los AngelesLos AngelesCA 90095USA Department of Radiological Sciences University of California-Los AngelesLos AngelesCA 90095USA Department of Chemical and Biomolecular Engineering University of California-Los AngelesLos AngelesCA 90095USA Terasaki Institute for Biomedical Innovation(TIBI) Los AngelesCA 90024USA

Brain tumors’severity ranges from benign to highly aggressive and *** tools can assist in understanding the pathophysiology of these tumors from outside the body and facilitate development of suitable antitumoral ***,we first describe the physiology and cellular composition of brain ***,we discuss the development of threedimensional tissue models utilizing brain tumor *** particular,we highlight the role of hydrogels in providing a biomimetic support for the cells to grow into defined *** technologies,such as electrospinning and bioprinting,and advanced cellular models aim to mimic the extracellular matrix and natural cellular localization in engineered tumor ***,we review current applications and prospects of hydrogels for therapeutic purposes,such as drug delivery and co-administration with other *** further development,hydrogels can serve as a reliable option for in vitro modeling and treatment of brain tumors for translational medicine.

关键词： Brain tumor Bioengineering Cancer cells Drug delivery Hydrogel

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Experimental and Finite Element Analysis of Corroded High-Pressure Pipeline Repaired by Laminated Composite

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Computer Modeling in Engineering & Sciences 2024年第8期140卷 1783-1806页

作者： Seyed mohammad Reza Abtahi Saeid Ansari sadrabadi Gholam Hosein Rahimi Gaurav Singh Hamid Abyar Daniele Amato Luigi Federico Faculty of Mechanical Engineering Tarbiat Modares UniversityTehran***Iran A.Leon Linton Department of Mechanical Robotics and Industrial EngineeringLawrence Technological UniversitySouthfieldMI48075USA Department of Mechanical Engineering Faculty of EngineeringMeybod UniversityYazd***Iran Department of Industrial Engineering University of SalernoVia Giovanni PaoloⅡFiscianoItaly Italian Aerospace Research Center(C.I.R.A.) Via MaioriseCapuaCE81043Italy

Repairs of corroded high-pressure pipelines are essential for fluids transportation under high *** of the methods used in their repairs is the use of layered *** composite used must have the necessary ***,the experiments and analytical solutions presented in this paper are performed according to the relevant standards and codes,including ASME PCC-2,ASME B31.8S,ASME B31.4,ISO 24817 and ASME *** addition,the experimental tests are replicated numerically using the finite element *** the strain gauges at different distances from the defect location,can reduce the nonlinear effects,deformation,and fluctuations due to the high *** direct relationship between the depth of an axial defect and the stress concentration is observed at the inner side edges of the *** reparation reduces the non-linearities related to the sharp variation of the geometry and a more reliable numerical simulation could be performed.

关键词： High-pressure pipeline composite repair ASME PCC-2 ISO 24817

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