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RISSmooth Switching Controller Design for Multiobjective Control Systems and Applications
Publisher: American Society of Civil Engineers
Abstract: Switching control theory is introduced to solve regulation and protection control problems in multiobjective control systems. Switching performance objectives and a switching strategy are given, and a family of ...
Physically Based Sand Slide Method in Scour Models Based on Slope-Limited Diffusion
Publisher: ASCE
Abstract: In scour simulation models, a sand slide step is necessary to treat the bed areas where the slope exceeds the angle of repose. This exceedance is due to the fact that the Exner equation does not take into consideration the ...
Flow and Scour around Idealized Porous Engineered Log Jam Structures
Publisher: ASCE
Abstract: Engineered log jams (ELJs) are used widely in practice as a river restoration measure. One desired feature of an ELJ is its porous nature, which plays an important role in hydrodynamics and sediment response. Currently ...
A Model-Based Framework for Dynamic Antiwindup Strategy for Gas Turbine Engine Fuel Control System
Publisher: ASCE
Abstract: Fuel control is usually required to work with the acceleration and deceleration schedules to provide limit protection. However, limit protection will deteriorate controller performance. In this work, we investigate a ...
Computational Fluid Dynamics–Based Evaluation and Verification of FISP Suspended Sediment Samplers
Publisher: ASCE
Abstract: Suspended sediment concentration is critical for many aspects of water resources management, such as sedimentation prevention in irrigation channels. Samplers from the Federal Interagency Sedimentation Project (FISP) are ...
Computational Fluid Dynamics Modeling for the Design of Large Primary Settling Tanks
Publisher: American Society of Civil Engineers
Abstract: Settling tanks are used to remove solids at wastewater treatment plants. Many numerical models have been proposed to simulate the settling process and to improve tank efficiency. In this research, a three-dimensional (3D) ...
Three-Dimensional Numerical Model with Free Water Surface and Mesh Deformation for Local Sediment Scour
Publisher: American Society of Civil Engineers
Abstract: A numerical model for local sediment scour with free surface and automatic mesh deformation is constructed and numerical results are compared with experimental results. For the turbulence closure, the two equation
Coupled Two-Dimensional Surface Flow and Three-Dimensional Subsurface Flow Modeling for Drainage of Permeable Road Pavement
Publisher: American Society of Civil Engineers
Flow Decomposition Method Based on Computational Fluid Dynamics for Rock Weir Head-Discharge Relationship
Publisher: ASCE
Abstract: Typical engineering design of rock weirs rely on simplified one-dimensional equations dependent on empirical coefficients. However, most simplified methods fail to accurately predict the hydraulics through rock weirs because ...
Numerical Simulation of Drainage of Permeable Friction Course Considering Surface Runoff and Seepage Flow
Publisher: ASCE
Abstract: Standing water on the pavement surface during rainy days is one of the major causes of roadway crashes. Permeable (sometimes porous is used instead of permeable) friction course (PFC) overlays have been installed on selected ...