3D design and numerical simulation of a check-valve micropump for lab-on-a-chip applications

2020 ◽  
Vol 16 (2) ◽  
pp. 237-248
Author(s):  
J. Mazloum ◽  
A. Shamsi
Keyword(s):  
Numerical Simulation ◽  
Check Valve ◽  
Lab On A Chip ◽  
3D Design

Design of Impeller of Centrifugal Compressor for Water-Air Engine

2014 ◽  
Vol 496-500 ◽  
pp. 642-645
Author(s):  
Yun Wang ◽  
Wei Zhang
Keyword(s):  
Numerical Simulation ◽  
Power System ◽  
Centrifugal Compressor ◽  
Centrifugal Impeller ◽  
3D Design ◽  
Pump Impeller ◽  
Aero Engine ◽  
Simulation Results

In view of power system in water-air UAV requirements, combine with the centrifugal impeller for aero-engine and the pump impeller. The design of a impeller of centrifugal compressor can work on the air and in the water for the new concept of air-water engine. With 3D design and a 3D CFD solver on it and analysis the results of numerical simulation. Results show that the designed impeller successfully reached the goal on the air and in the water. The experiences accumulated in this procedure are useful for similar impeller aerodynamic designs.

Numerical Simulation of a Check Valve Closure Induced by Pump Shutdown

2018 ◽  
Vol 144 (12) ◽  
pp. 06018013 ◽  
Author(s):  
Zhounian Lai ◽  
Qian Li ◽  
Bryan Karney ◽  
Shuai Yang ◽  
Dazhuan Wu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Check Valve ◽  
Valve Closure

Laser-Induced Thermal Bubble-Mixing on a Microfluidic Platform for Lab-on-a-Chip Applications

2012 ◽  
Vol 557-559 ◽  
pp. 2197-2201 ◽  
Author(s):  
Xuan Xuan Dong ◽  
Lei Zhang ◽  
Jian Fu
Keyword(s):  
Numerical Simulation ◽  
Laminar Flow ◽  
Chemical Analysis ◽  
Lab On A Chip ◽  
Multimode Interference ◽  
Air Bubbles ◽  
Interference Effects ◽  
Microfluidic Platform ◽  
Air Bubble ◽  
Nano Fiber

This paper discusses the study of the multimode evolution of microfiber taper and its potential application of micromixer in the lab-on-a-chip. By using numerical simulation, multimode interference effects are demonstrated in the taper transition of a micro-nano fiber. Due to the leaked optical energy gasifies the solution surrounding the taper and produces air bubbles, the laminar flow effect is destroyed with the help of disturbance of air bubble and two solutions are mixed quickly. Therefore, it will be used in microfluidic platform for chemical analysis & testing, chemical synthesis and environmental monitoring.

Design and Simulation of a Novel Check Valve Made by SU-8

2012 ◽  
Vol 479-481 ◽  
pp. 2271-2274
Author(s):  
Tai Guo ◽  
Cong Chun Zhang ◽  
Gui Fu Ding
Keyword(s):  
Maximum Stress ◽  
Check Valve ◽  
Lab On A Chip ◽  
Microfluidic Devices ◽  
Maximum Deflection ◽  
Functional Material ◽  
Membrane Layer ◽  
Mems Technology ◽  
Simulation Results ◽  
Polymeric Microfluidic

In this paper, we describe the design, simulation of a novel check valve suitable for potentially embedding in polymeric microfluidic devices such as micro-pumps. Using SU-8 as functional material, the check valve can be fabricated by MEMS technology, such as, UV-LIGA and electroforming. The check valve mainly consists of two structural layers: inlet layer and valve membrane layer. From simulation, the maximum deflection of check valve membrane is 116μm under pressure of 2000Pa, and the maximum stress is 18.1MPa. We consider the fit thickness of valve membrane is 20μm. Simulation results demonstrate that this novel check valve can be potentially integrated in many micro-pumps and other lab-on-a-chip systems.

Numerical simulation and experimental validation of the cavitating flow through a ball check valve

2014 ◽  
Vol 78 ◽  
pp. 776-786 ◽  
Author(s):  
José R. Valdés ◽  
José M. Rodríguez ◽  
Raúl Monge ◽  
José C. Peña ◽  
Thomas Pütz
Keyword(s):  
Numerical Simulation ◽  
Experimental Validation ◽  
Check Valve ◽  
Cavitating Flow ◽  
Flow Through

Improving 3D Flow Characteristics in a Multistage LP Turbine by Means of Endwall Contouring and Airfoil Design Modification: Part 2 — Numerical Simulation and Analysis

2002 ◽  
Author(s):  
Jochen Gier ◽  
Sabine Ardey ◽  
Stefan Eymann ◽  
Ulf Reinmo¨ller ◽  
Reinhard Niehuis
Keyword(s):  
Numerical Simulation ◽  
Secondary Flow ◽  
Flow Characteristics ◽  
Navier Stokes ◽  
3D Design ◽  
Design Modification ◽  
Local Loss ◽  
Endwall Contouring ◽  
Transition Modeling ◽  
Lp Turbine

Endwall losses contribute significantly to the overall losses in modern turbomachinery, especially when aerodynamic airfoil load and pressure ratios are increased. Hence, reducing the extend and intensity of the secondary flow structures helps to enhance overall efficiency. This work will focus on secondary flow reduction in typical aero engine low pressure turbines. From the large range of viable approaches, a promising combination of axis symmetric endwall contouring and 3D airfoil thickening was chosen. Aerodynamic design, experimental verification and further analysis based on numerical simulation are described in a two part paper. In the second part the implications of the 3D modifications on the flow structure are analyzed by employing a 3D Navier-Stokes simulation based on the experimental data reported in part one. For obtaining reliable flow simulations at typical LP turbine conditions, it is important to apply a 3D Navier-Stokes solver with proven turbulence and transition modeling to the three-stage LP turbine of the Institute of Aeronautical Propulsion at Stuttgart University. Numerical and experimental results exhibit regions, where the modified design leads to a change in flow pattern in accordance with the design intent, as well as regions with an actual increase in loss production. The flow changes in both regions are evaluated and discussed. It is found that a certain local loss increase phenomenon can also be found in other LP turbine rigs. The reasons for this behavior are analyzed by a comparison with data from other turbine rigs and by an additional variation of the 3D design of the first stage of the investigated turbine.

Hydrodynamic characterization and optimization of Contra-push check valve by numerical simulation

2011 ◽  
Vol 38 (6) ◽  
pp. 1427-1437 ◽  
Author(s):  
Han Xu ◽  
Zheng Ming Guang ◽  
Yu Yi Qi
Keyword(s):  
Numerical Simulation ◽  
Check Valve

scholarly journals Investigation of Check Valve Aerodynamic Characteristics in Different Operating Modes

2018 ◽  
Vol 3 (3) ◽  
pp. 127
Author(s):  
D.A. Pakholik ◽  
A.V. Sobolev ◽  
A.S. Shelegov
Keyword(s):  
Numerical Simulation ◽  
Computational Study ◽  
Ventilation System ◽  
Check Valve ◽  
Aerodynamic Characteristics ◽  
Air Velocity ◽  
Valve Body ◽  
Operating Modes ◽  
System Check ◽  
Actual Flow Rate

The paper presents a computational study of the NPP ventilation system check valve aerodynamics, namely, a numerical simulation of the air flowing through the open valve with the subsequent determination of the relationship between the reactive torque acting on the valve closure axles and the input air velocity.This numerical simulation of the air flowing through the check valve was performed using the ANSYS CFX program. In the computation, different operating modes of the check valve were considered when the air flow was passing through it. The valve operating modes were set depending on changes in the input air velocity. As a result of aerodynamic computation, the values of pressure and velocity components were obtained over the entire valve volume.Reactive forces were calculated in the ANSYS Mechanical program. The reactive forces acting on the valve body form a torque at the gate axles. When adjusting the check valve to the actual flow rate, it is necessary to know this torque value and compensate for it. As a result of a series of computations of reactive forces, a relationship was found between the torque value of the valve’s working element axles and the input air velocity. 

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