Analisis Numerik Pengaruh Sudut Sudu Pengarah Difuser Jet Swirling dan Grille Terhadap Distribusi Sifat-Sifat Termodinamika Udara dalam Ruang Terkondisi

Karudin, Arwizet

doi:10.24036/invotek.v20i2.789

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…The SIMPLE method differential difference is converted into a linear equation with the volume control method, which divides the calculation domain into small areas (control volume) and the center point as a node that represents the properties of the area [15]. The SIMPLE algorithm is an iterative pressure field algorithm that is obtained by iterating the initial guess on the actual value.…”

Section: Fluid Model Analysis Uses Special Techniques Based On Volume...mentioning

confidence: 99%

“…The SIMPLE algorithm is a numerical procedure that is widely used in Computational Fluid Dynamics (CFD) to solve the basic equations governing fluid mechanics using a guessing procedure for calculating pressure on a staggered grid [15]. The mathematical model is simulated with the parameters of the thickness of the grease accumulation thickness of 80%, 65%, 50%, 35%, and 20% and the initial velocity of 0.2 m/s, 0.3 m/s, and 0.4 m/s in diameters of 9.343 mm, 7,862 mm, and 6.381 mm.…”

Section: Fluid Model Analysis Uses Special Techniques Based On Volume...mentioning

confidence: 99%

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Numerical Analysis in Arterial Stenosis Affected by Ischemic Heart Disease Using Finite Volume Method

Fatahillah,

Pratiwi,

Setiawani

et al. 2024

BAREKENG: J. Math. & App.

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Atherosclerosis is the narrowing of blood vessels caused by the buildup of cholesterol plaque on the walls of the arteries. Excessive buildup of cholesterol plaque disrupts the circulatory system, thereby affecting the speed and pressure of blood flow. In the long term, atherosclerosis can cause ischemic heart disease. This study aims to analyze the influence of stenosis, initial velocity, and diameter on the velocity and pressure of blood flow in narrowed arteries that cause ischemic heart disease. In this research, a Navier Stoke mathematical equation model was built which was solved using the finite volume method with SIMPLE discretization (Semi Implicit Method for Pressure Linked Equations). Finite volume methods are used to analyze unstructured objects such as blood flow. SIMPLE discretization is implemented simply in two and three dimensions with a system of equations containing fluid motion. Matlab and Fluent are software used for process simulations, Matlab for visualizing graphs of numerical calculation results, and Fluent for visualizing blood flow. Based on the simulation results, it can be concluded that the smaller the diameter, the greater the stenosis, and the greater the initial velocity, the greater the blood flow velocity. On the contrary, the diameter gets smaller, the stenosis gets bigger, and the initial velocity gets bigger so that the pressure on the blood flow gets smaller. Blood flow simulation has the potential to contain ischemic heart disease if the maximum speed produced is greater than the maximum normal blood speed, namely 0.45 m/s.

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Section: Fluid Model Analysis Uses Special Techniques Based On Volume...mentioning

confidence: 99%

Section: Fluid Model Analysis Uses Special Techniques Based On Volume...mentioning

confidence: 99%

Numerical Analysis in Arterial Stenosis Affected by Ischemic Heart Disease Using Finite Volume Method

Fatahillah,

Pratiwi,

Setiawani

et al. 2024

BAREKENG: J. Math. & App.

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show abstract

“…Persamaan diferensial ditransformasikan ke dalam persamaan linier dengan membagi domain perhitungan membentuk daerah-daerah kecil (volume control) dan titik tengah nodal akan mewakili sifat daerah tersebut (Gambar 5.) [20]. Proses Metode simulasi CFD menggunakan hukum gerak hukum Newton kedua yang dikombinasikan dengan hukum Stoke, menghasilkan tiga persamaan momentum untuk kecepatan ke arah xj (j=1, 2, 3).…”

Section: Bilangan Reynoldunclassified

Comparison Lift and Drag of Airfoil NACA 1408 Standard and Modification Using Computational Fluid Dynamic

Usin¹,

Fernanda²,

Karudin³

et al. 2022

motivection

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An airfoil is a geometry shape of an aircraft wing designed to produce high lift force and low drag forces. Study on the air flow and pressure around of the airfoil was important step to analysis lift force and drag force. Factor affecting the lift force and drag force airfoil are the geometry and dimensions of the airfoil. This study to discus about the modification airfoil NACA 1408 was performed by adding round tip in leading edge to obtain simulate air flow by varying the angle of attack. The result showed that coefficient of lift (Cl) and coefficient of drag (Cd) was calculated from the simulations, data the highest Cl and Cd were 0.00277 and 0.00025 for the standard airfoil and for modification airfoil were 0.00343 and 0.00064. Based on the test result, the modified airfoil can produce better lift force than the standard shapes for test speed of 20 m/s. Airfoil merupakan bentuk geometri sayap pesawat terbang yang dirancang untuk menghasilkan lift force tinggi dan drag force rendah. Studi tentang aliran udara dan tekanan di sekitar airfoil adalah langkah penting untuk menganalisis lift force dan drag force. Faktor yang mempengaruhi lift force dan drag force airfoil adalah geometri dan dimensi airfoil tersebut. Penelitian ini membahas tentang modifikasi dilakukan pada airfoil NACA 1408 dengan menambahkan ujung bulat pada leading edge dan mendapatkan simulasi aliran udara dengan memvariasikan angle of attack. Hasil penelitian menunjukkan bahwa coefficient of lift dan coefficient of drag dihitung dari simulasi, data coefficient of lift dan coefficient of drag tertinggi adalah 0.00277 dan 0.00025 untuk airfoil standar dan untuk airfoil modifikasi adalah 0.00343 dan 0.00064. Berdasarkan hasil pengujian, airfoil modifikasi dapat menghasilkan lift force lebih baik daripada bentuk standar untuk kecepatan uji 20 m/s.

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Numerical modelling of blood vessel constriction due to peripheral artery disease using finite volume method

Fatahillah,

Prasetyo,

Adawiyah

et al. 2024

AIP Conference Proceedings

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Analisis Numerik Pengaruh Sudut Sudu Pengarah Difuser Jet Swirling dan Grille Terhadap Distribusi Sifat-Sifat Termodinamika Udara dalam Ruang Terkondisi

Cited by 3 publications

References 3 publications

Numerical Analysis in Arterial Stenosis Affected by Ischemic Heart Disease Using Finite Volume Method

Numerical Analysis in Arterial Stenosis Affected by Ischemic Heart Disease Using Finite Volume Method

Comparison Lift and Drag of Airfoil NACA 1408 Standard and Modification Using Computational Fluid Dynamic

Numerical modelling of blood vessel constriction due to peripheral artery disease using finite volume method

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