scholarly journals Dynamic Modeling and Flow Distribution of Complex Micron Scale Pipe Network

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 763
Author(s):  
Yao Zhao ◽  
Kai Zhang ◽  
Fengbei Guo ◽  
Mingyue Yang
Keyword(s):  
Calculation Method ◽  
Flow Distribution ◽  
Microfluidic Devices ◽  
Active Role ◽  
Fluid Simulation ◽  
Electrical Method ◽  
Fluid Network ◽  
Microfluidic Network ◽  
Simulation Calculation ◽  
Length Changes

A fluid simulation calculation method of the microfluidic network is proposed as a means to achieve the flow distribution of the microfluidic network. This paper quantitatively analyzes the influence of flow distribution in microfluidic devices impacted by pressure variation in the pressure source and channel length. The flow distribution in microfluidic devices with three types of channel lengths under three different pressure conditions is studied and shows that the results obtained by the simulation calculation method on the basis of the fluid network are close to those given by the calculation method of the conventional electrical method. The simulation calculation method on the basis of the fluid network studied in this paper has computational reliability and can respond to the influence of microfluidic network length changes to the fluid system, which plays an active role in Lab-on-a-chip design and microchannel flow prediction.

Wheel-Rail Multi-Point Contact Method for Railway Turnouts

2011 ◽  
Vol 97-98 ◽  
pp. 378-381
Author(s):  
Zhi Wei Chen ◽  
Linan Li ◽  
Shi Gang Sun ◽  
Jun Long Zhou
Keyword(s):  
Calculation Method ◽  
Normal Force ◽  
Contact Point ◽  
Point Contact ◽  
Contact Model ◽  
Contact Method ◽  
Elastic Contact ◽  
Simulation Calculation ◽  
Acute Change

A calculation method of wheel-rail multi-point contact based on the elastic contact model is introduced. Moreover, the simulation calculation of vehicles passing through branch lines of No.18 turnouts is carried out. The result showed that the acute change of wheel-rail normal force caused by the transfers of wheel-rail contact point between two rails can be avoid by wheel-rail multi-point contact method, and the transfers of wheel-rail normal force between two rails is smoother. The validity of wheel-rail multi-point contact method is verified.

scholarly journals Water-Exit Process Modeling and Added-Mass Calculation of the Submarine-Launched Missile

2017 ◽  
Vol 24 (s3) ◽  
pp. 152-164 ◽  
Author(s):  
Jian Yang ◽  
Jinfu Feng ◽  
Yongli Li ◽  
An Liu ◽  
Junhua Hu ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Calculation Method ◽  
Added Mass ◽  
Simulation Software ◽  
Fluid Simulation ◽  
Modeling Process ◽  
Complex Fluid ◽  
Simulated Analysis ◽  
Changing Rate ◽  
Water Exit

Abstract In the process that the submarine-launched missile exits the water, there is the complex fluid solid coupling phenomenon. Therefore, it is difficult to establish the accurate water-exit dynamic model. In the paper, according to the characteristics of the water-exit motion, based on the traditional method of added mass, considering the added mass changing rate, the water-exit dynamic model is established. And with help of the CFX fluid simulation software, a new calculation method of the added mass that is suit for submarine-launched missile is proposed, which can effectively solve the problem of fluid solid coupling in modeling process. Then by the new calculation method, the change law of the added mass in water-exit process of the missile is obtained. In simulated analysis, for the water-exit process of the missile, by comparing the results of the numerical simulation and the calculation of theoretical model, the effectiveness of the new added mass calculation method and the accuracy of the water-exit dynamic model that considers the added mass changing rate are verified.

scholarly journals Operation Analysis of Organic Rankine Cycle under Variable Conditions and Comparison confirmation of simulation calculation

2019 ◽  
Vol 136 ◽  
pp. 03031
Author(s):  
Chen Xiaoqing ◽  
Jiang Weiting ◽  
Cao Xianchang ◽  
Zhang Li’ang ◽  
Chen Chi ◽  
...  
Keyword(s):  
Power Generation ◽  
Calculation Method ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Generation System ◽  
Operation Analysis ◽  
Simulation Calculation ◽  
Power Generation System ◽  
And Control

The initial simulation calculation of the ORC power generation system was carried out using the software Aspen Plus, and the simulation data matched with the design conditions were obtained. According to the specific structure of the evaporator and superheater in the ORC power generation system and the characteristics of the software Aspen EDR, a new simulation calculation method is proposed: structural simulation calculation method. The calculation method and the direct simulation calculation method are used to carry out simulation comparison to find out the regularity of the change of waste heat resources, and it is convenient to further analyze and control the ORC power generation system.

Research on Fault Diagnosis System of Heat Pipe Network

2012 ◽  
Vol 193-194 ◽  
pp. 619-623
Author(s):  
Yu Kun Lv ◽  
Hai Feng Liu ◽  
Shuai Chang ◽  
Bao Jun Song ◽  
Kai Zhao
Keyword(s):  
Fault Diagnosis ◽  
Heat Pipe ◽  
Calculation Method ◽  
Pipe Network ◽  
Positioning Accuracy ◽  
Diagnosis System ◽  
Simulation Calculation ◽  
Urban Heat ◽  
Fault Diagnosis System ◽  
Network Fault

The urban heat pipe network fault diagnosis system was designed in this paper so as to realize the automation diagnosis. The paper uses the simulation calculation method and the heat pipe network fault diagnosis system to analyze and study an urban heat pipe network leak fault. The diagnosis results of the heat pipe network fault diagnosis system are almost the same to that of the simulation calculation method. Moreover, the system can accurately locate the leak point and the positioning accuracy is 5%. Thus the heat pipe network fault diagnosis system which is designed has a certain practical value.

EFD Fluid Simulation of Ball Valve on SolidWorks

2013 ◽  
Vol 823 ◽  
pp. 13-16
Author(s):  
Jie Zhang
Keyword(s):  
3D Model ◽  
Parametric Design ◽  
Flow Simulation ◽  
Ball Valve ◽  
Fluid Simulation ◽  
Design Quality ◽  
Improve Design ◽  
Hole Edge ◽  
Design Cycle ◽  
Simulation Calculation

Based on the way of parametric design with SolidWorks, The 3D model of Whole welding type forged steel ball valve is established, Based on SolidWorks Flow Simulation, the simulation dynamic characteristics of ball valve was analyzed, By studying the ball hole edge radius R, Pointed out the direction for the design, through the simulation calculation of target parameters, analyzing the rationality of the structure of the sphere, to optimize the structure of ball valve, shorten the design cycle, and improve design quality. The simulation results are helpful to design improvement. The result indicates that the method is advanced and feasible. It has better practicability.

A calculation method for transient flow distribution of SCWR(CSR1000)

2017 ◽  
Vol 110 ◽  
pp. 541-546 ◽  
Author(s):  
Juan Chen ◽  
Tao Zhou ◽  
Jie Chen ◽  
Liang Liu ◽  
Ali Shahzad Muhammad ◽  
...  
Keyword(s):  
Calculation Method ◽  
Transient Flow ◽  
Flow Distribution

Simulation Calculation Method Study on Machinery Output Torque

2012 ◽  
Vol 152-154 ◽  
pp. 727-731
Author(s):  
Jing Jin ◽  
Wei Ge Liang ◽  
Zhen Shan Zhang
Keyword(s):  
Simulation Model ◽  
Theoretical Calculation ◽  
Dynamic Simulation ◽  
Calculation Method ◽  
Simulation Method ◽  
Output Torque ◽  
Simulation Calculation ◽  
Power Machinery ◽  
Dynamic Simulation Model ◽  
Engine Dynamic

By analyzing the output procedure and theoretical calculation method of power machinery output torque, a kind of advisable simulation method to power machinery output torque was put forward. For example, the wobble plate engine dynamic simulation model was created by this method. And simulation calculation was done based on dynamic model. Result Comparison between simulation calculation and theoretical calculation shows that this method has high calculation precision and maneuverability. At last, some reference suggestions were put forward for application.

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