Study on the Composite Spinning Co-Extrusion Process of the Tri-Component

2013 ◽  
Vol 661 ◽  
pp. 81-86
Author(s):  
Lei Wang ◽  
Huai Chen ◽  
Ting Ting Liu ◽  
Jun Yang Ji ◽  
Xue Hui Gan
Keyword(s):  
Fluid Dynamics ◽  
Flow Control ◽  
Extrusion Process ◽  
Simulation Software ◽  
Experimental Results ◽  
Dynamics Simulation ◽  
Flow Ratio ◽  
Molding Process ◽  
Swell Ratio ◽  
Extrusion Swell

In the molding process of the tri-component composite spinning, the flow control of each component plays a significant impact on extrusion swell. This paper simulates the extrusion swell of the tri-component fiber in different flow ratio of different components based on Polyflow fluid dynamics simulation software, and measures the extrusion swell ratio of the tri-component fiber in different flow ratio of different components through the experiment. Simulation and experimental results show that by adjusting the melt flow ratio of the various components, we can obtain the desired extrusion swell ratio, which can improve the performance of the tri-component fiber.

scholarly journals Trapping bacteria and fungi using microfluidic design

2022 ◽  
Vol 9 (1) ◽  
pp. 110-116
Author(s):  
Galon et al. ◽  
Keyword(s):  
Fluid Dynamics ◽  
Dimensional Space ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Two Dimensional ◽  
Candida Auris ◽  
E Coli ◽  
Numerical Predictions ◽  
Bacteria And Fungi ◽  
Default Setting

Escherichia coli and Candida auris are not easy to identify in laboratories without special technology. In this study, we have presented microfluidic designs for trapping bacteria and fungi. Two trapping chambers are designed using AutoCAD and the fluid dynamics of the bacteria and fungi are simulated using D. Schroeder’s Fluid Dynamics Simulation software. The designs are modified versions of a device that is constructed and simulated with numerical predictions, which include sizes and apertures in consideration of the specified microbe. The current designs take into account the exact dimensions of E. coli and C. auris under fluid flow and passive microfluidic technique, where actuation is based on geometry, is considered. The measurements of the design ensure that the species are to be trapped due to diffusion and ¬¬fluid dynamics. From the simulation, the stagnation is to be shown with its default setting, and approximation is done in its motion which is simulated in the two-dimensional space of the bacteria and fungi. The microfluidic designs will be useful during experiments in deciphering necessary information of the bacteria and fungi and will be a platform in modeling numerous biomedical assays and in the optimization of biophysical tools.

Association of design and computational fluid dynamics simulation intent in flow control product optimization

2017 ◽  
Vol 232 (13) ◽  
pp. 2309-2322 ◽  
Author(s):  
Lei Li ◽  
Carlos F Lange ◽  
Yongsheng Ma
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Flow Control ◽  
Computer Aided Design ◽  
Integrated Design ◽  
Control Device ◽  
Dynamics Simulation ◽  
Computational Fluid Dynamics Simulation ◽  
Computer Aided ◽  
Aided Design

Computational fluid dynamics has been extensively used for fluid flow simulation and thus guiding the flow control device design. However, computational fluid dynamics simulation requires explicit geometry input and complicated solver setup, which is a barrier in case of the cyclic computer-aided design/computational fluid dynamics integrated design process. Tedious human interventions are inevitable to make up the gap. To fix this issue, this work proposed a theoretical framework where the computational fluid dynamics solver setup can be intelligently assisted by the simulation intent capture. Two feature concepts, the fluid physics feature and the dynamic physics feature, have been defined to support the simulation intent capture. A prototype has been developed for the computer-aided design/computational fluid dynamics integrated design implementation without the need of human intervention, where the design intent and computational fluid dynamics simulation intent are associated seamlessly. An outflow control device used in the steam-assisted gravity drainage process is studied using this prototype, and the target performance of the device is effectively optimized.

scholarly journals Aerodynamic research of a racing car based on wind tunnel test and computational fluid dynamics

2018 ◽  
Vol 153 ◽  
pp. 04011
Author(s):  
Jianfeng Wang ◽  
Hao Li ◽  
Yiqun Liu ◽  
Tao Liu ◽  
Haibo Gao
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Wind Tunnel ◽  
Cfd Simulation ◽  
Wind Tunnel Test ◽  
Aerodynamic Characteristics ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Aerodynamic Forces ◽  
Automotive Aerodynamics

Wind tunnel test and computational fluid dynamics (CFD) simulation are two main methods for the study of automotive aerodynamics. CFD simulation software solves the results in calculation by using the basic theory of aerodynamic. Calculation will inevitably lead to bias, and the wind tunnel test can effectively simulate the real driving condition, which is the most effective aerodynamics research method. This paper researches the aerodynamic characteristics of the wing of a racing car. Aerodynamic model of a racing car is established. Wind tunnel test is carried out and compared with the simulation results of computational fluid dynamics. The deviation of the two methods is small, and the accuracy of computational fluid dynamics simulation is verified. By means of CFD software simulation, the coefficients of six aerodynamic forces are fitted and the aerodynamic equations are obtained. Finally, the aerodynamic forces and torques of the racing car travel in bend are calculated.

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