Numerical Simulation of Water Flow Velocity for Microfluidic Application Using COMSOL Multiphysics

2014 ◽  
Vol 925 ◽  
pp. 651-655
Author(s):  
Nurulazirah Md Salih ◽  
Uda Hashim ◽  
Nayan Nafarizal ◽  
Chin Fhong Soon ◽  
Mohd Zainizan Sahdan
Keyword(s):  
Flow Velocity ◽  
Water Flow ◽  
Flow Behavior ◽  
Microfluidic Devices ◽  
Channel Length ◽  
Comsol Multiphysics ◽  
Simulation Design ◽  
Cross Sectional ◽  
Water Flow Velocity ◽  
Simulation Results

In microfluidic devices, the most important aspect has to be considered for the manufacturing process is the geometric design. Simulation is a good approach for determining the performance of the design. In this study, several microchannel designs were simulated using COMSOL Multiphysics 4.2 software in order to find the optimized geometry. It involves a study of different shape, diameter, length, and angle of microchannels design, and its influence on the water flow velocity. From the simulation results, an optimize microchannels design was obtained which consists of 100 μm cross-sectional diameter, 4:3:11 channel length ratio, and 35 degrees of microchannels angle. Further study could be done to improve the finding of the microfluidic simulation design for better water flow behavior.

Surface Tension Analysis of Cost-Effective Paraffin Wax and Water Flow Simulation for Microfluidic Device

2013 ◽  
Vol 832 ◽  
pp. 773-777
Author(s):  
Nurulazirah Md Salih ◽  
U. Hashim ◽  
Nayan Nafarizal ◽  
Chin Fhong Soon ◽  
Mohd Zainizan Sahdan
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Flow Velocity ◽  
Water Flow ◽  
Microfluidic Device ◽  
Flow Simulation ◽  
Channel Length ◽  
Paraffin Wax ◽  
Inlet Channel ◽  
Water Flow Velocity

In microfluidic devices, the most important aspect has to be considered for the manufacturing process is the material suitability and geometric design. Among the materials studied, paraffin wax has never been tested and it is proposed as the new approach in this paper for patterning the microchannels. Furthermore, contact angle analysis of the paraffin wax was also studied. Based on the contact angle measurements; the hydrophobicity and surface tension of paraffin wax were analyzed. From the finding, it shows that paraffin wax has a low surface tension and high hydrophobicity. Then, several microchannels design was simulated using COMSOL multiphysics 4.2 software in order to find the optimized geometry. It involves a study of different shape, diameter, length, and angle of microchannels design, and its influence on the water flow velocity. From the simulation results, an optimize microchannels design was obtained consists of 1000 μm channels diameter, 1000 μm inlet channel length, 1.0 cm outlet channels length, and 110o inlet channel angle with water flow velocity of 2.3cm/s. Further study could be done to improve the finding of properties and geometric suitability for microfluidic device.

scholarly journals Analysis of the Effect of Cross-sectional Area on Water Flow Velocity by Using Venturimeter Tubes

2020 ◽  
Vol 8 (1) ◽  
pp. 94-99
Author(s):  
Ana Dhiqfaini Sultan ◽  
Rizky Rizky ◽  
Hidayat Hidayat ◽  
Sri Mulyani ◽  
Wahdah Anugrah Yusuf
Keyword(s):  
Flow Velocity ◽  
Water Level ◽  
Water Flow ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional ◽  
Water Flow Velocity ◽  
Heavy Medium ◽  
Air Flow Velocity ◽  
Analyze Data

This simple experiment with title  the analysis of the effect of cross-sectional area on air flow velocity using a venturimeter tube with aim to know the relation between section wide, speed of water flow and water level in capillary pipes and to know basic principle of Bernoulli and the application in simple set. The activity was reading water level of capillary pipes the caused by changes of water flow that started from heavy, medium, and low. Then analyzed the data that got for every changes of water flow that started from count the different water level in capillary pipes on big pipes and small pipes after that looking for speed of fluid flow on both pipes. Based on analyze data as a result relation between section wide, speed of water flow and water level in capillary pipes that was as bigger of section wide then the speed of water flow was getting smaller and the level water in capillary pipes was getting taller. This is appropriate with Bernoulli principle that states an increase in the speed of a fluid on a pipe with decrease in pressure and in reverse.Keywords: Venturimeter Tube, Cross-Sectional Area, Speed Of Water Flow, Water Level, Principle Of BernoulliEksperimen sederhana ini berjudul analisis pengaruh luas penampang terhadap kecepatan aliran air dengan menggunakan Tabung Venturimeter yang bertujuan untuk mengetahui hubungan antara luas penampang, Kecepatan aliran air dan ketinggian air pada pipa kapiler serta untuk mengetahui prinsip dasar hukum Bernoulli dan penerapannya dalam rangkaian sederhana. Kegiatan yang dilakukan adalah membaca ketinggian air pipa kapiler yang disebabkan dari perubahan laju aliran air dimulai dari deras, sedang dan rendah. Kemudian menganalisis data yang diperoleh untuk setiap perubahan laju aliran air yang dimulai dari menghitung perbedaan ketinggian air pipa kapiler pada pipa besar dan pipa kecil setelah itu mencari kecepatan aliran fluida pada kedua pipa. Berdasarkan analisis data diperoleh hubungan antara luas penampang, kecepatan aliran air dan ketinggian air pada pipa kapiler yakni semakin besar luas penampang pipa maka kecepatan aliran air pada pipa semakin kecil dan ketinggian air pada pipa kapiler semakin tinggi. Hal ini sesuai dengan bunyi asas Bernoulli yang menyatakan bahwa semakin besar kecepatan fluida dalam suatu pipa maka tekanannya makin kecil dan sebaliknya makin kecil kecepatan fluida dalam suatu pipa maka semakin besar tekanannya.Kata kunci: Tabung Venturimeter, Luas Penampang, Kecepatan aliran air, Ketinggian air, hukum Bernoulli

The effects of changing water flow velocity on the formation of biofilms and water quality in pilot distribution system consisting of copper or polyethylene pipes

2006 ◽  
Vol 40 (11) ◽  
pp. 2151-2160 ◽  
Author(s):  
Markku J. Lehtola ◽  
Michaela Laxander ◽  
Ilkka T. Miettinen ◽  
Arja Hirvonen ◽  
Terttu Vartiainen ◽  
...  
Keyword(s):  
Water Quality ◽  
Flow Velocity ◽  
Water Flow ◽  
Distribution System ◽  
Water Flow Velocity ◽  
Polyethylene Pipes

Effect of slope gradient on the subsurface water flow velocity of sand layer profile

2020 ◽  
Vol 17 (3) ◽  
pp. 641-652 ◽  
Author(s):  
Zhen Han ◽  
Xiao-yan Chen ◽  
Yu-han Huang ◽  
Bang-lin Luo ◽  
Hang Xing ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Water Flow ◽  
Subsurface Water ◽  
Sand Layer ◽  
Slope Gradient ◽  
Water Flow Velocity

scholarly journals INVESTIGATION OF CAPABILITIES OF ELECTROMAGNETIC TOMOGRAPHY FOR PIPELINE IMAGING

2019 ◽  
Vol 81 (5) ◽  
Author(s):  
Nur Fharahin Mukaiyin ◽  
Elmy Johana Mohamad ◽  
Zulkifli Mansor ◽  
Hanis Liyana Mohamad Ameran ◽  
Ruzairi Abdul Rahim ◽  
...  
Keyword(s):  
Eddy Current ◽  
Oil And Gas ◽  
Comsol Multiphysics ◽  
Main Principle ◽  
Cross Sectional ◽  
Electromagnetic Tomography ◽  
Current Testing ◽  
On Site Inspection ◽  
Simulation Results ◽  
Alternative Solutions

The demand in an efficient technique to monitor the condition of the pipeline for oil and gas industries leads to research into alternative solutions. The conventional methods are often too expansive and require manpower to conduct an on-site inspection. Using the Eddy current testing as the main principle, this study aims to explore the capability of 8-coil channel EMT as pipeline imaging in a different analytical situation. The 2D 8-coil channel is developed using COMSOL Multiphysics and using 20 kHz sinusoidal frequency to detect the pipeline with different materials, which is alloy and aluminum. Simulation results proved that EMT is a capable tool for inspection of metallic pipelines. This paper also presented a comparison of the pipeline cross-sectional images from the simulation and experimental.

scholarly journals Water load pattern in a production hall

2018 ◽  
Vol 45 ◽  
pp. 00015 ◽  
Author(s):  
Edyta Dudkiewicz ◽  
Alina Żabnieńska-Góra
Keyword(s):  
Flow Velocity ◽  
Water Flow ◽  
Hot Water ◽  
Domestic Water ◽  
Water Flow Velocity ◽  
Water Load ◽  
Actual Volume ◽  
Load Pattern ◽  
And Gender ◽  
Selection Of

The actual volume of water consumption in the various industrial halls is very diverse. Many factors have an impact on that value, depending on the demand for: domestic, fire-fighting, technologically specific target and other purposes. The demand for domestic water in the production hall is primarily due to the use of showers, wash basins and flush toilets. Workplaces should be appropriately equipped with hygienic and sanitary facilities, depending on its degree of soiling, type of work and gender. The water flow is relevant for dimensioning the water supply system including the diameter selection of the water pipes. Criterion for selection of the diameter is the flow velocity of the water which varies depending on the manufacturer’s guidelines, the material used and the law. The article analyses the dynamics of load pattern of hot water in industrial halls. The methods of flow calculation in production halls based on an analysis of patterns available in literature and the water flow velocity criteria is discussed. The results of the research of the dynamics of water load pattern in a production hall located in Wroclaw is presented and discussed.

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