Parallel Computer Technology Study on Hydrodynamic and Sediment Transport Mathematical Model in Estuaries Based on MPI

2014 ◽  
Author(s):  
Cheng Wenlong ◽  
Shi Yingbiao ◽  
Wu Xiuguang ◽  
Li Zhiyong ◽  
Wang Rongsheng
Keyword(s):  
Mathematical Model ◽  
Sediment Transport ◽  
Computer Technology ◽  
Parallel Computer ◽  
Technology Study

Principles and approaches for numerical modelling of sediment transport in sewers

1995 ◽  
Vol 31 (7) ◽  
pp. 107-115 ◽  
Author(s):  
Ole Mark ◽  
Cecilia Appelgren ◽  
Torben Larsen
Keyword(s):  
Mathematical Model ◽  
Sediment Transport ◽  
Numerical Modelling ◽  
Simple Application ◽  
Sewer Systems ◽  
Sediment Deposits ◽  
Model Mouse ◽  
Modelling Approaches

A study has been carried out with the objectives of describing the effect of sediment deposits on the hydraulic capacity of sewer systems and to investigate the sediment transport in sewer systems. A result of the study is a mathematical model MOUSE ST which describes sediment transport in sewers. This paper discusses the applicability and the limitations of various modelling approaches and sediment transport formulations in MOUSE ST. Further, the paper presents a simple application of MOUSE ST to the Rya catchment in Gothenburg, Sweden.

Design of Control of DC Motor

2014 ◽  
Vol 611 ◽  
pp. 325-331
Author(s):  
Ľubica Miková ◽  
Michal Kelemen ◽  
Vladislav Maxim ◽  
Jaromír Jezný
Keyword(s):  
Mathematical Model ◽  
Virtual Environment ◽  
Computer Technology ◽  
Current Practice ◽  
Scientific Literature ◽  
Model Simulation ◽  
Graphical Interface ◽  
Dc Motors ◽  
Matlab Program ◽  
Simulation Results

In current practice the use of mathematical models is substantially widespread, reason being the recent increase in development of programs for this purpose, with the option of model simulation in a virtual environment, proportional to the evolving computer technology. The article contains a mathematical model created using Matlab program. The simulation results are compared with scientific literature that addresses DC motors and evaluated. For simplicity, a graphical interface was created.

scholarly journals LOCAL SCOUR CHARACTERISTICS OF GROINS AT TIDAL WATERWAYS AND THEIR SIMULATION

2011 ◽  
Vol 1 (32) ◽  
pp. 66
Author(s):  
Xiping Dou ◽  
Xinzhou Zhang ◽  
Xiao-dong Zhao ◽  
Xiangming Wang
Keyword(s):  
Mathematical Model ◽  
Sediment Transport ◽  
Steady Flow ◽  
Tidal Current ◽  
River Regulation ◽  
Local Scour ◽  
Hydraulic Structures ◽  
Scour Depth ◽  
Channel Regulation ◽  
Tidal Rivers

For the channel regulation in tidal rivers, groins are often used as typical hydraulic structures. Precisely predicting the local scour depth at the groin head is the key for the project of river regulation. The local scour of groins for tidal rivers is significantly different from that for the undirectional steady flow of general rivers. In the present paper, a three-dimendional (3D) mathematical model for turbulence and sediment transport are establishmented. The local scour near the groin under the actions of tidal current and steady flow are simulated by established 3D turbulence and sediment transport numerical model.The differences of the scour development and the scour pattern near the groin under these two actions are compared.

Development and evaluation of a mathematical model for the study of sediment-related water quality issues

2001 ◽  
Vol 43 (7) ◽  
pp. 47-54 ◽  
Author(s):  
W. Zeng ◽  
M. B. Beck
Keyword(s):  
Mathematical Model ◽  
Water Quality ◽  
Sediment Transport ◽  
Nutrient Dynamics ◽  
Specific Conductivity ◽  
Level Structure ◽  
Nutrient Concentrations ◽  
Data Set ◽  
Major Tributary ◽  
Quality Issues

A mathematical model (Sediment-Transport-Associated Nutrient Dynamics - STAND) has been developed for the study of sediment-associated water quality issues. The model is intended to simulate changes of water composition associated with sediment behavior. It has a 3-level structure. The first level accounts for the hydraulics of open-channel flow. The second computes sediment transport potential and actual rates based on the information provided by the first level. A non-equilibrium approach is used. In the third level, changes of nutrient concentrations along a studied river are computed with the consideration of nutrient transport, adsorption/desorption, and release. In order to calibrate the model, field data were collected from the Oconee River, a major tributary of the Altamaha River in Georgia, USA. Two stations, approximately 17 km distant from each other, were established along the river for the purpose of data collection. Observations of the river's hydraulics, suspended sediment, and water quality (mainly ortho-phosphate, nitrate, temperature, specific conductivity, oxidation-reduction potential, dissolved oxygen, and pH) were collected at the two stations. Another data set collected along a major tributary of the Yellow River in China was also used for calibration of the model's hydraulics and sediment transport parts. Calibration and validation results are encouraging, which suggests STAND may be a useful tool for the thorough study and understanding of nutrient dynamics associated with sediment behaviour.

scholarly journals Development of a Program for Calculating the Air Regime of a Building

2021 ◽  
Vol 2096 (1) ◽  
pp. 012128
Author(s):  
S Biriukov
Keyword(s):  
Mathematical Model ◽  
Model Calculation ◽  
Computer Technology ◽  
Software Systems ◽  
Calculation Algorithms ◽  
Specialized Program

Abstract The article describes the main differences between a specialized program for calculating the air regime of a building and universal software systems. Algorithms for creating a mathematical model, calculation algorithms and applications are given. A brief description of the principles of the program, the requirements for computer technology and software are given.

scholarly journals Lateral turbulent mixing forces in the long shore current calculation by Longuet-Higgins method and their influence on long shore sediment transport

2003 ◽  
Vol 25 (4) ◽  
pp. 214-224
Author(s):  
Nguyen Manh Hung
Keyword(s):  
Mathematical Model ◽  
Sediment Transport ◽  
Turbulent Mixing ◽  
Field Application ◽  
Coastal Engineering ◽  
Current Calculation

Longuet - Higgins method for long shore current and Bijker method for sediment transport calculations are worldwide used mathematical model in the coastal engineering. When using them, we should image how work the methods and what is sensitivity and influence of each parameters on final results as sediment transport. In this paper, the influences of parameters N, P of lateral turbulent mixing forces on the long shore current and then on the sediment transport are estimated. The Bijker example is used and the computation results are compared with Bijker results for neglecting the lateral turbulent mixing. A field application with appropriate parameters N and P for Le Thuy beach is obtained for verification of long shore current and sediment transport.

A New Method to Calculate Mixed-Layer Thickness Based on Sand Wave Movement

2012 ◽  
Vol 212-213 ◽  
pp. 33-39
Author(s):  
Hua Ge ◽  
Ling Ling Zhu ◽  
Xi Bing Zhang
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Sediment Transport ◽  
Layer Thickness ◽  
Mixed Layer ◽  
River Sediment ◽  
New Method ◽  
Sand Wave ◽  
Wide Field ◽  
Time Step

It is pointed out that the influence of the time step in the unsteady non-uniform sediment mathematical model must be considered when to calculate the mixed-layer thickness in this article. And then a new method to calculate the mixed-layer thickness is obtained based on the sand wave movement. This method can well reflect the effect of the time step on the mixed-layer thickness, and has a wide field of application in the numerical simulation of natural river sediment transport.

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