scholarly journals Optimal Flow Distribution of Military Supply Transportation Based on Network Analysis and Entropy Measurement

Entropy ◽  
2018 ◽  
Vol 20 (6) ◽  
pp. 446 ◽  
Author(s):  
Wei Zhou ◽  
Jin Chen ◽  
Bingqing Ding
Keyword(s):  
Network Analysis ◽  
Flow Distribution ◽  
Optimal Flow ◽  
Entropy Measurement

Optimal Flow Distribution in Service Function Chaining

2015 ◽  
Author(s):  
Giwon Lee ◽  
Myeongsu Kim ◽  
Sukjin Choo ◽  
Sangheon Pack ◽  
Younghwa Kim
Keyword(s):  
Flow Distribution ◽  
Service Function ◽  
Optimal Flow

Optimal flow distribution among multiple channels with unknown capacities

2005 ◽  
Vol 19 ◽  
pp. 225-231
Author(s):  
Richard Karp ◽  
Till Nierhoff ◽  
Till Tantau
Keyword(s):  
Flow Distribution ◽  
Multiple Channels ◽  
Optimal Flow

scholarly journals Optimal Flow Distribution Algorithm for Efficient Service Function Chaining

2015 ◽  
Vol 40 (6) ◽  
pp. 1032-1039
Author(s):  
Myeongsu Kim ◽  
Giwon Lee ◽  
Sukjin Choo ◽  
Sangheon Pack ◽  
Younghwa Kim
Keyword(s):  
Flow Distribution ◽  
Service Function ◽  
Optimal Flow

scholarly journals Pumping Station Design in Water Distribution Networks Considering the Optimal Flow Distribution between Sources and Capital and Operating Costs

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3098
Author(s):  
Jimmy H. Gutiérrez-Bahamondes ◽  
Daniel Mora-Meliá ◽  
Pedro L. Iglesias-Rey ◽  
F. Javier Martínez-Solano ◽  
Yamisleydi Salgueiro
Keyword(s):  
Optimization Model ◽  
Water Distribution ◽  
Flow Distribution ◽  
Distribution Networks ◽  
Operating Conditions ◽  
Water Distribution Networks ◽  
Operating Costs ◽  
Normal Operation ◽  
Optimal Flow ◽  
Pumping Stations

The investment and operating costs of pumping stations in drinking water distribution networks are some of the highest public costs in urban sectors. Generally, these systems are designed based on extreme scenarios. However, in periods of normal operation, extra energy is produced, thereby generating excess costs. To avoid this problem, this work presents a new methodology for the design of pumping stations. The proposed technique is based on the use of a setpoint curve to optimize the operating and investment costs of a station simultaneously. According to this purpose, a novel mathematical optimization model is developed. The solution output by the model includes the selection of the pumps, the dimensions of pipelines, and the optimal flow distribution among all water sources for a given network. To demonstrate the advantages of using this technique, a case study network is presented. A pseudo-genetic algorithm (PGA) is implemented to resolve the optimization model. Finally, the obtained results show that it is possible to determine the full design and operating conditions required to achieve the lowest cost in a multiple pump station network.

scholarly journals Innovative transformations of a model for flow distribution in gas systems and their new properties

2019 ◽  
Vol 102 ◽  
pp. 02004
Author(s):  
Nikolay I. Ilkevich ◽  
Tatyana.V. Dzyubina ◽  
Zhanna.V. Kalinina
Keyword(s):  
Network Analysis ◽  
Flow Distribution ◽  
Supply System ◽  
Distribution Model ◽  
Gas Flows ◽  
Modern Development ◽  
Gas System ◽  
Gas Supply

The methods of network analysis are widely used in mathematical modelling of optimal gas flows to solve the problems of long-term planning and development of gas systems. However, the modern development of gas systems, their renovation and modernization require that the new trends in innovative transformation should be taken into account in the mathematical models for their research as well. This paper is focused on the proposals for considering the new properties of gas system in the mathematical flow distribution model as compared to the traditional formulation. Case study involves the calculation of gas flows for an aggregated unified gas supply system for the period up to 2030. This calculation allows for the edge coefficients and a gain in the transmission capacities of the edges.

Network Analysis of Non-Uniformly Heated Evaporative Micro-Channel Systems

2010 ◽  
Author(s):  
Hee Joon Lee ◽  
Shi-chune Yao
Keyword(s):  
Network Analysis ◽  
Flow Distribution ◽  
Iterative Solution ◽  
Micro Channel ◽  
Uniform Heating ◽  
Channel Network ◽  
Two Phase ◽  
Uniform Wall Temperature ◽  
Micro Channels ◽  
Hardy Cross

A network analysis was established to model the array of evaporative micro-channels with possible non-uniformity heating as well as branching of the channels. Iterative solution of the evaporative micro-channel network can be obtained using the Hardy-Cross method together with accurate two-phase head-loss correlations. Based on the experimental evidence, cross-cutting micro-channels reduce the uneven flow distribution in parallel micro-channels at non-uniform heating. Through this network analysis, it is also evident that cross-cutting grooves on parallel micro-channels are effective in reducing non-uniform heating effects and enhancing the uniform wall temperature distribution.

Numerical Investigation of Flow Diffuser Optimization for a PWR Reactor With Code_Saturne: Analysis on EPR Type Reactor

2016 ◽  
Author(s):  
Tingting Xu ◽  
Jiesheng Min ◽  
Guofei Chen ◽  
Samuel Delepine ◽  
Serge Bellet ◽  
...  
Keyword(s):  
Reactor Core ◽  
Flow Distribution ◽  
Scientific Basis ◽  
Core Flow ◽  
Source Codes ◽  
Figures Of Merit ◽  
Optimal Flow ◽  
Computational Fluid Dynamics Cfd ◽  
High Level ◽  
Physical Phenomena

In order to provide scientific basis for new reactor design in terms of optimal Flow Diffuser, a study was launched on the analysis and investigation on flow distribution of existing flow diffuser design of five different reactors including EPR, VVER, Konvoi, APR+ and Westinghouse. The strategy is to change each time only the flow diffuser within the 1/5 scale BORA mock-up1. The authors consider that the optimal design needs to reach a homogeneous inlet core flow rate, which is defined as figures of merit. This study combines PIRT (Phenomena Identification and Ranking Table) methodology and Computational Fluid Dynamics (CFD) calculations to identify the optimal flow diffuser design. This paper introduces main physical phenomena analysis with PIRT methodology to list the most important phenomena and parameters from cold legs to lower core plate which have a high level of influence on the flow distribution at reactor core inlet for EPR reactor type. CFD calculations are performed under the injection condition of 0.1 m3/s per cold leg at 1/5 scale BORA mock-up for EPR flow diffuser configuration. EDF in-house open-source codes are applied to perform CFD calculations including Salomé2 for pre-processing and postprocessing and Code_Saturne3 for solver.

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