scholarly journals ANALISIS AERODINAMIKA PADA PERMUKAAN BODI KENDARAAN MOBIL LISTRIK GASKI (GANESHA SAKTI) DENGAN PERANGKAT LUNAK ANSYS 14.5

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Yudi Prihadnyana ◽  
Gede Widayana ◽  
Kadek Rihendra Dantes
Keyword(s):  
Fluid Flow ◽  
Flow Rate ◽  
Body Modification ◽  
The Body ◽  
Vehicle Body ◽  
Maximum Pressure ◽  
Air Velocity ◽  
Electric Cars ◽  
Minimum Pressure ◽  
Electric Car

Dengan perkembangan teknologi yang semakin maju bentuk dari bodi sebuah kendaraan sangatlah diperhitungkan untuk mencapai tujuan-tujuan tertentu. Untuk itu, dilakukan analisis Aerodinamika pada pemukaan bodi mobil listrik gaski dengan menggunakan perangkat lunak Ansys 14.5, yang bertujuan untuk mengetahui aliran fluida dan nilai koefisient drag pada mobil listrik Gaski bodi standar dan modifikasi. Setelah proses analisis dilakukan, didapatkan hasil velocity udara maksimum body standar sebesar 17,4324 m/s dan body modifikasi sebesar 17,7321 m/s dan pressure maksimum yang terjadi pada mobil listrik Gaski body standar sebesar 83,2143 Pa, dan minimum sebesar -189,879 Pa. sedangkan pressure maksimum yang terjadi pada mobil listrik Gaski body modifikasi sebesar 83,2143 Pa. dan minimum pressure diperoleh -182,128 Pa. nilai Koefisient drag dari mobil listrik Gaski body standar sebesar 0,00474 sedangkan pada body modifikasi sebesar 0,00407. Dari hasil peneletian tersebut didapatkan bahwa setalah dilakukan modifikasi pada bodi mobil listrik gaski terdapat beberapa perubahan diantaranya terjadi peningkatan kecepatan laju aliran udara atau velocity udara meningkat 1,72 % sedangkan tekanan yang diterima oleh bodi setelah dimodifikasi menurun 1,39 % dan Nilai koefisien drag pada mobil listrik gaski dapat diturunkan 14,14 % setelah dimodifikasi.Kata Kunci : kata kunci : Aerodinamika, aliran fluida, bodi kendaraan, With the technological development of the more advanced form of the body of a vehicle is very calculated to achieve certain goals. For that purpose, Aerodynamic analysis was performed on the electric car body surface by using Ansys 14.5 software, which aims to find out the fluid flow and coefficient value of drag on electric car Gaski standard body and modification. After the analysis process is done, the result of the maximum air velocity of the standard body is 17,4324 m / s and body modification of 17,7321 m / s and the maximum pressure happened to electric car Gaski body standard equal to 83,2143 Pa, 189,879 Pa. While the maximum pressure that occurs on electric cars Gaski body modification of 83.2143 Pa. And the minimum pressure obtained -182.128 Pa. Coefficient value of drag from electric car Gaski body standard of 0,00474 while at body modification equal to 0,00407. From the results of the research was found that after modification on the body of electric car gaski there are some changes such as increase the speed of air flow rate or air velocity increased by 1.72%, while the pressure received by the body after modification decreased 1.39% and the value of drag coefficient on Electric car gaski can be derived 14.14% after modified.keyword : Keywords : Aerodynamic, fluid flow rate, Vehicle body.

scholarly journals Aerodynamics analysis of electric car UM body surface using computational fluid dynamics

2018 ◽  
Vol 204 ◽  
pp. 07016
Author(s):  
Mardji ◽  
Andoko ◽  
Dani Prsetiyo
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Fluid Flow ◽  
Experimental Testing ◽  
Flow Analysis ◽  
Maximum Velocity ◽  
The Body ◽  
Maximum Pressure ◽  
Large Area ◽  
Electric Car

The body shape that is engineered in such a way will produce fluid flow characteristics that very and greatly affect the function of the shape of the body. However, until now researchers have not been able to find the right solution to diagnose and synthesize flow structures, so that it is done directly through experimental testing [3]. One of them by using the help of a software CFD (Computational Fluid Dynamics) is Ansys 18.1. Fluid Flow Analysis on the surface of the body electric car UM produces several characteristics such as fluid flow which has a significant obstacle, especially on the surface that has a wide surface that causes a flow that causes the flow is red which indicates the velocity of air flowing in that large area obtained maximum velocity air results of 21.1885m / s marked with the color red and velocity minimum of 0.03947m / s marked in blue, other than that when the air flows produce a pressure that produces the maximum pressure received by the body of 79.12Pa and the minimum pressure of -316.1Pa and the value of drag coefficient from the car body electric car UM obtained results of 0.46.

Trapped air in ventilated excised rat lungs

1976 ◽  
Vol 40 (6) ◽  
pp. 915-922 ◽  
Author(s):  
D. G. Frazer ◽  
K. C. Weber
Keyword(s):  
Stress Relaxation ◽  
Flow Rate ◽  
Lung Volume ◽  
Transpulmonary Pressure ◽  
Maximum Pressure ◽  
Lung Inflation ◽  
Minimum Pressure ◽  
Trapped Air ◽  
Rat Lungs ◽  
Reference Pressure

Degassed excised rat lungs were ventilated in a water-filled plethysmograph with the carina as the zero pressure reference. Pressure-volume curves were recorded from a minimum transpulmonary pressure (Pmin) of -5 cmH2O to a maximum pressure (Pmin) of 30 cmH2O. An index of the minimun volume for the lung (Vm) divided by the maximum lung volume for the same cycle (Vmax) was used as an index of the amount of air trapped within the lung. As the flow rate was decreased from 38.2 to 1.9 ml/min, there were significant increases in the amount of air trapped in the lung. As the maximum pressure was decreased to 25 and 20 cmH2O, or the minimum pressure was increased to 6 and 11 cmH2O, the amount of trapped air in the lung significantly decreased. The rate of lung inflation had a much greater influence on the amount of trapped air than either the deflation rate or stress relaxation. The results are consistent with the theory that bubbles are formed during inflation and are the main cause of air trapped in the excised lung.

scholarly journals Design an Occlusion Calibrator using XGZP6887 and Servo Motor MG966R as a Simulator

2021 ◽  
Vol 3 (1) ◽  
pp. 29-33
Author(s):  
Rizki Auliya ◽  
Syaifudin Syaifudin ◽  
Liliek Soetjiatie
Keyword(s):  
Fluid Flow ◽  
Blood Clot ◽  
Infusion Pump ◽  
Air Embolism ◽  
Data Retrieval ◽  
The Body ◽  
Maximum Pressure ◽  
Syringe Pump ◽  
Servo Motor ◽  
Average Value

A foreign fluid that enters the patient can cause some bodily reactions including infection, air embolism and blood clot. Side effects given will be fatal to the body, one of which occurs the blockage of the capillary vessels in the heart that can cause heart attack to stroke. The purpose of this research is to design a tool that can be used to measure maximum pressure as a form of the calibration of the syringe pump and infusion pump. The contribution of this research is that the system can simulate the presence of blockages in fluid flow and detect large pressure values detected by the Under Test Unit (UUT) with a motor peerround system that opens/closes fluid flow. Servo Motor MG966R simulate the presence of blockage with constant motor degree until the alarm UUT reads, then Sensor XGZP6887 detects the pressure generated by the blockage and processed by the microcontroller and displayed on the LCD display of the character. This study resulted in a maximum pressure average value of 7.12 Psi. The results showed that data retrieval had an error value of -0.12. This research can be implemented to perform pressure measurements on the syringe pump or infusion pump.

scholarly journals Design and Optimization of an Electric Car Chassis and Body using Structural Analysis and CFD

2021 ◽  
Author(s):  
Mohammed Aiyan ◽  
Sumanth Sagar ◽  
Sanjay Raghav S
Keyword(s):  
Structural Analysis ◽  
Automotive Industry ◽  
Fibre Composite ◽  
Torsional Rigidity ◽  
The Body ◽  
Carbon Fibre Composite ◽  
Electric Cars ◽  
Design And Optimization ◽  
Electric Car ◽  
Vehicle Components

Abstract The transition from traditional gasoline-powered automobiles to electric vehicles (EVs) has taken time, two major challenges of engine- powered vehicles are greenhouse gas emissions and fuel economy. Electric cars require less maintenance. A lot of money can be saved while also helping the environment. In today's world, working with lightweight materials have emerged as a key area for improvement in the automotive industry. The most efficient method for increasing power output is to reduce the weight of vehicle components. Composite materials have benefited greatly from research and development because they are stronger, more recyclable, and easier to integrate into vehicles. The primary goal of this research is to design the body and chassis frame of a two-seater electric car. A CFD analysis was performed to determine the drag coefficient of the body along with structural analysis to obtain the frontal impact and torsional rigidity of the chassis to develop an effective electric car design. The design was carried out with the help of CATIA V5 software, while the analysis was performed using ANSYS 19.2. A comparative analysis of the chassis was undertaken by incorporating three different materials namely, traditional steel i.e., Stainless Steel 304L, Aluminium Alloy 7075-T6, T300 Carbon Fibre composite. The energy efficiency of the car for the three materials are also computed.

Water Hammer Induced Vibration of a Fluid Filled Pipe

2005 ◽  
Author(s):  
Yi Jia ◽  
Ezequiel Me´dici ◽  
Frederick Just-Agosto ◽  
David Serrano ◽  
Luciano Castillo
Keyword(s):  
Numerical Simulation ◽  
Fluid Flow ◽  
Flow Rate ◽  
Vibration Frequency ◽  
Water Hammer ◽  
Maximum Pressure ◽  
Fluid Flow Rate ◽  
Geometrical Configuration ◽  
Vibration Equation ◽  
Classical Formulation

The objectives of this study are to analyze the behavior of a pipe under different valve open and closure times and to predict water hammer-induced transient maximum pressure, deflection and frequency of vibration in a fluid filled pipe. The model that integrated a classical formulation of water hammer problem and beam vibration equation was developed and a numerical simulation including frictional losses has been carried out. The MacCormak and Runge-Kutta methods were used to solve governing partial differential equations in order to investigate water hammer induced vibration of a fluid filled pipe. The results show that fluid flow rate does not change the vibration frequency of pipe. The peak wave pressures, maximum pipe deflections at various valve open and closure times, and the frequencies of vibration with variation of fluid speed and pipe geometrical configuration are presented.

scholarly journals ANALISIS ALIRAN FLUIDA PADA PERMUKAAN BODI KENDARAAN LISTRIK GANESHA SCOOTER UNDERWATER BERBASIS SOFTWARE SOLIDWORKS

2018 ◽  
Vol 6 (3) ◽  
pp. 121
Author(s):  
Vidsvara Putra Krisnanandha ◽  
Kadek Rihendra Dantes ◽  
I Nyoman Pasek Nugraha
Keyword(s):  
Fluid Flow ◽  
Drag Coefficient ◽  
Electric Vehicle ◽  
Flow Analysis ◽  
The Body ◽  
Vehicle Body ◽  
Marine Tourism ◽  
Average Value ◽  
Body Design ◽  
Fluid Flow Analysis

Menyelam merupakan salah satu kegiatan yang dilakukan manusia didalam air. Kegiatan tersebut memiliki banyak tujuan seperti olahraga, penjelajah, melihat keindahan wisata bahari dan bahkan penelitian. Oleh karena itu dibutuhkan alat bantu kendaraan untuk memudahkan manusia dalam menyelam atau bergerak didalam air, merancang sebuah kendaraan yang harus diperhatikan adalah komponen-komponen salah satunya bodi kendaraan. Dalam sebuah bentuk rancangan bodi akan terjadi sebuah fenomena aliran fluida yang menyebabkan terjadi sebuah gaya hambat (drag) yang sering dianggap menggangu atau menghambat pergerakan sebuah kendaraan yang melalui sebuah fluida. Untuk itu, analisis aliran fluida pada bodi kendaraan listrik Ganesha Scooter Underwater dengan menggunakan software Solidworks 2018 dengan tujuan untuk mengetahui karakteristik dan besaran coefficient of drag. Setelah melakukan analisis dengan menggunakan software Solidworks 2018 bodi kendaraan listrik Ganesha Scooter Underwater mendapatkan penurunan nilai rata-rata pressure sebesar 4,25%, nilai velocity meningkat 2,9% dan nilai coefficient of drag menurun 8,38% setelah dilakukan modifikasi desain bodi kendaraan listrik Ganesha Scooter Underwater. Dapat dikatakan desain modifikasi lebih aerodinamis dibandingkan desain standar.Kata Kunci : aliran fluida, software solidworks, bodi, coefficient of drag. Diving is one of the activities carried out by humans in water. These activities have many goals such as sports, explorers, seeing the beauty of marine tourism and even research. Therefore a vehicle tool is needed to make it easier for humans to dive or move in the water, designing a vehicle that must be considered are the components of one of the vehicle bodies. In a body design form there will be a phenomenon of fluid flow that causes a drag to occur which is often considered to interfere with or inhibit the movement of a vehicle through a fluid. For this reason, fluid flow analysis on the body of the electric vehicle Underwater Scooter using the software Solidworks 2018 with the aim to determine the characteristics and magnitude of the drag coefficient. After analyzing using Solidworks 2018 body of electric vehicle, Underwater Ganesha Scooter software has decreased the average value of pressure by 4.25%, velocity value increased by 2.9% and coefficient of drag value decreased by 8.38% after modification of vehicle body design Electric Ganesha Scooter Underwater. It can be said the modified design is more aerodynamic than the standard designkeyword : fluid flow, solidworks software, body, drag coefficient.

scholarly journals Метод жидкостной пленочной нейтрализации токсичных газовых выбросов

2020 ◽  
Vol 43 (2) ◽  
Author(s):  
VLADIMIR STATSENKO ◽  
MIKHAIL EREMENKO ◽  
MAYA BERNАVSKAYA
Keyword(s):  
Nitric Oxide ◽  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Fluid Flow ◽  
Flow Rate ◽  
Film Flow ◽  
Water Flow Rate ◽  
Gas Absorption ◽  
Air Velocity ◽  
Experimental Stand

Для очистки воздуха от газовых технологических выбросов и аэрозолей, а также выхлопных газов от энергетических установок (в том числе судовых) предлагается использование метода пленочной жидкостной нейтрализации, что применяется в химических технологиях. Установка представляет собой закрытый корпус, в котором организовано пленочное течение жидкости по вертикальным пластинам. При движении загрязненного воздуха между пластинами пленка жидкости как абсорбент интенсивно поглощает газообразные и твердые загрязняющие вещества. Для исследования интенсивности абсорбции газов авторами настоящей статьи спроектирован и изготовлен экспериментальный стенд, в котором на вертикальной латунной пластине задается пленочное течение воды и раствора соды, вдоль пленки вверх движется воздух, содержащий газы: двуокись углерода, окись углерода, окись азота различной концентрации. В экспериментах изменялись скорость воздуха, расход жидкости, концентрация газов. Анализ результатов показал: при использовании воды в качестве абсорбирующего элемента оптимальная скорость воздуха составляет 0,8–1 м/с, оптимальный расход – 1,2–1,37 л/мин. Это позволяет снизить концентрацию газа двуокиси углерода на 30–45%, окиси углерода – на 20–30% и окиси азота – на 18–23%. При использовании в качестве абсорбирующего элемента раствора соды для двуокиси углерода возможно снижение концентрации на 30–40%, для окиси углерода – на 50–55%. For the purification of air from gas emissions and aerosols, a liquid neutralization unit is pro-posed. It is a closed case, in which the film flow of liquid along vertical plates is organized. When polluted air moves between the plates, the liquid film as an absorbent intensively absorbs gaseous and solid pollutants. To study the intensity of gas absorption, an experimental stand was designed and manufactured in which a film flow of water and a soda solution is set on a vertical brass plate, air, which contains gases: carbon dioxide, carbon monoxide, nitric oxide of various concentra-tions, moves upward along the film. In the experiments, the air velocity, fluid flow rate, and gas concentration changed. As a result of the analysis of the obtained results, it was revealed that when using water as an absorbing element, the optimal air velocity is 0.8–1 m/s, the optimal water flow rate is 1,2–1,37 l/min. This allows you to reduce the concentration of carbon dioxide as by 30–45%, carbon mon-oxide as by 20–30% and nitric oxide gas by 18–23%. When using a solution of soda for carbon dioxide as an absorbing element, it is possible to reduce the concentration by 30–40%, for carbon monoxide by 50– 55%. When calculating the universal characteristics of the fluid flow in the form of a film, the irrigation value is obtained.

EFFECT OF BODY MASS INDEX ON PEAK EXPIRATORY FLOW RATE

2019 ◽  
Vol 3 (9) ◽  
Author(s):  
K. Subramanyam ◽  
Dr. P. Subhash Babu
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Peak Expiratory Flow ◽  
Flow Rate ◽  
Peak Expiratory Flow Rate ◽  
Normal Weight ◽  
The Body ◽  
Health Care Centre ◽  
Expiratory Flow ◽  
Group B

Obesity has become one of the major health issues in India. WHO defines obesity as “A condition with excessive fat accumulation in the body to the extent that the health and wellbeing are adversely affected”. Obesity results from a complex interaction of genetic, behavioral, environmental and socioeconomic factors causing an imbalance in energy production and expenditure. Peak expiratory flow rate is the maximum rate of airflow that can be generated during forced expiratory manoeuvre starting from total lung capacity. The simplicity of the method is its main advantage. It is measured by using a standard Wright Peak Flow Meter or mini Wright Meter. The aim of the study is to see the effect of body mass index on Peak Expiratory Flow Rate values in young adults. The place of a study was done tertiary health care centre, in India for the period of 6 months. Study was performed on 80 subjects age group 20 -30 years, categorised as normal weight BMI =18.5 -24.99 kg/m2 and overweight BMI =25-29.99 kg/m2. There were 40 normal weight BMI (Group A) and 40 over weight BMI (Group B). BMI affects PEFR. Increase in BMI decreases PEFR. Early identification of risk individuals prior to the onset of disease is imperative in our developing country. Keywords: BMI, PEFR.

Application of Cross-correlation Analysis Method for Measurement of the Fluid Flow Rate Based on X-ray Radiation

2019 ◽  
Vol 11 (1) ◽  
pp. 01025-1-01025-5 ◽  
Author(s):  
N. A. Borodulya ◽  
◽  
R. O. Rezaev ◽  
S. G. Chistyakov ◽  
E. I. Smirnova ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Correlation Analysis ◽  
Flow Rate ◽  
Cross Correlation ◽  
Fluid Flow Rate ◽  
Analysis Method ◽  
X Ray ◽  
Cross Correlation Analysis ◽  
Correlation Analysis Method

Study of fluid flow through a channel deformed by piezoelement

2018 ◽  
Vol 13 (3) ◽  
pp. 1-10 ◽  
Author(s):  
I.Sh. Nasibullayev ◽  
E.Sh Nasibullaeva ◽  
O.V. Darintsev
Keyword(s):  
Fluid Flow ◽  
Pressure Drop ◽  
Boundary Conditions ◽  
Flow Rate ◽  
Contact Surface ◽  
Piezoelectric Element ◽  
Neumann Boundary ◽  
Differential Pressure ◽  
Physical Parameters ◽  
Flow Through

The flow of a liquid through a tube deformed by a piezoelectric cell under a harmonic law is studied in this paper. Linear deformations are compared for the Dirichlet and Neumann boundary conditions on the contact surface of the tube and piezoelectric element. The flow of fluid through a deformed channel for two flow regimes is investigated: in a tube with one closed end due to deformation of the tube; for a tube with two open ends due to deformation of the tube and the differential pressure applied to the channel. The flow rate of the liquid is calculated as a function of the frequency of the deformations, the pressure drop and the physical parameters of the liquid.

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