scholarly journals PEMODELAN MATEMATIKA ALIRAN UDARA PADA PARU-PARU AKIBAT PENYAKIT CORONAVIRUS DISEASE 2019 (COVID-19)

KadikmA ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 9
Author(s):  
Yogi - Setiawan
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Flow Velocity ◽  
Initial Velocity ◽  
Air Flow ◽  
Airflow Velocity ◽  
Fluent Software ◽  
Air Flow Velocity ◽  
The Mathematical Model ◽  
Element Method

The bronchial airways are an important part of the respiratory system, it is not uncommon for the bronchi to experience disturbances, one of the disorders due to coronavirus diseases (Covid-19). Coronavirus diseases (Covid-19) are what cause narrowing of the bronchial tubes so that they will interfere with the speed of air flow. This airflow speed will be modeled with mathematical language. The mathematical model of air flow velocity in this study is formed based on equations of momentum equations which are then solved by the finite element method. Speed ​​analysis Air flow was simulated using MATLAB and FLUENT software. The problems studied are the effect of the narrowing diameter, initial velocity, and viscosity on the air flow velocity. Based on the research results show that the smaller the narrowing diameter and the viscosity of the incoming air, the greater the airflow velocity, while for the greater the initial velocity, the greater the resulting airflow velocity. Keywords: Coronavirus Diseases 2019 (Covid-19), bronchial, lungs, airways, finite element method.  

Design of an Induction Glass Melting Furnace by Means of Mathematical Modelling Using the Finite Element Method

2007 ◽  
Vol 553 ◽  
pp. 124-129 ◽  
Author(s):  
Isaac Arellano ◽  
Gabriel Plascencia ◽  
Elías Carrillo ◽  
Miguel A. Barrón ◽  
Adolfo Sánchez ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Glass Melting ◽  
Melting Furnace ◽  
The Finite Element Method ◽  
Glass Melting Furnace ◽  
High Frequencies ◽  
Harmful Emissions ◽  
The Mathematical Model ◽  
Element Method

In this paper we propose the design of a novel induction furnace for glass melting. The design is based on a mathematical analysis and performed numerically by means of the Finite Element Method. Several induction coils configurations were tested. The results from the mathematical model show that it is possible to melt glass in a furnace whose hearth is no larger than half a metre by using axial induction coils and high frequencies. This furnace configuration may result in increased glass melting rates along with the elimination of harmful emissions.

A Material Selection Method Based on Finite Element Method

2014 ◽  
Vol 887-888 ◽  
pp. 1013-1016
Author(s):  
Sheng Bin Wu ◽  
Xiao Bao Liu
Keyword(s):  
Mathematical Model ◽  
Finite Element Method ◽  
Finite Element ◽  
Material Selection ◽  
Selection Method ◽  
Structure Design ◽  
The Finite Element Method ◽  
The Mathematical Model ◽  
Selection Of ◽  
Element Method

A new method for material selection in structure design based on the theory of the finite element method was presented. The method made material selection and structure design working at the same time. The mathematical model was established based on the finite element method. Finally, the material selection of an excavator's boom was verified, the results show that the proposed method is effective and feasible.

Modelling of Heat and Moisture Transfer Phenomena During Dry Biscuit Baking by Using Finite Element Method

2012 ◽  
Vol 8 (3) ◽  
Author(s):  
Enrico Ferrari ◽  
Simone V. Marai ◽  
Riccardo Guidetti ◽  
Laura Piazza
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Moisture Transfer ◽  
Continuous Functions ◽  
Transfer Model ◽  
The Finite Element Method ◽  
Baking Process ◽  
Heat And Moisture ◽  
The Mathematical Model ◽  
Element Method

Abstract This paper validates a simultaneous heat and mass transfer model proposed to describe the discontinuous biscuit baking process. The mathematical model includes the moving evaporation front and the development of the crust observed during the baking process. The problem is solved over a two-dimensional geometry using the finite element method. Thermo-physical properties were computed by means of continuous functions. Variations in temperature and water content during baking were predicted with high to discrete accuracy using this model.

The Application of Finite Element Method in Calculating Two-Dimensional Heat Conduction in the Ground

2014 ◽  
Vol 988 ◽  
pp. 479-482
Author(s):  
Hui Zhang ◽  
Jing Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Field ◽  
Heat Conduction ◽  
Soil Temperature ◽  
Heat Conduction Problem ◽  
Two Dimensional ◽  
The Finite Element Method ◽  
The Mathematical Model ◽  
Element Method

This thesis simulated the principle of the fast heat conductivity testing instrument, introduced how to use the finite element method to calculate two-dimensional unstable heat conduction condition. When establish the mathematical model, the article simplifies the soil temperature field as the two-dimensional non-stable heat conduction problem. Through computation it can get the soil temperature field at any moment in the running time and the plan uniform temperature lines, that also may obtain the change of temperature about one point in the process. The method is simple and credible. These solutions of these questions are the foundation of research the heat conduction in the ground and the temperature field.

scholarly journals Simulation of Fluid-Thermal Field in Oil-Immersed Transformer Winding Based on Dimensionless Least-Squares and Upwind Finite Element Method

Energies ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 2357 ◽  
Author(s):  
Gang Liu ◽  
Zhi Zheng ◽  
Dongwei Yuan ◽  
Lin Li ◽  
Weige Wu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Least Squares ◽  
Thermal Field ◽  
Effect Of Temperature ◽  
Preconditioned Conjugate Gradient ◽  
Fluid Field ◽  
Computation Efficiency ◽  
Fluent Software ◽  
Element Method

In order to study the coupling fluid and thermal problems of the local winding in oil-immersed power transformers, the least-squares finite element method (LSFEM) and upwind finite element method (UFEM) are adopted, respectively, to calculate the fluid and thermal field in the oil duct. When solving the coupling problem by sequential iterations, the effect of temperature on the material property and the loss density of the windings should be taken into account. In order to improve the computation efficiency for the coupling fields, an algorithm, which adopts two techniques, the dimensionless LSFEM and the combination of Jacobi preconditioned conjugate gradient method (JPCGM) and the two-side equilibration method (TSEM), is proposed in this paper. To validate the efficiency of the proposed algorithm, a local winding model of a transformer is built and the fluid field is computed by the conventional LSFEM, dimensionless LSFEM, and the Fluent software. While the fluid and thermal computation results of the local winding model of a transformer obtained by the two LSFEMs are basically consistent with those of the Fluent software, the stiffness matrix, which is formed by the dimensionless scheme of LSFEM and preconditioned by the JPCGM and TSEM, has a smaller condition number and a faster convergence rate of the equations. Thus, it demonstrates a broader applicability.

Analysis of Plate Bending in Coilbox by Finite Element Method

2010 ◽  
Vol 443 ◽  
pp. 146-151 ◽  
Author(s):  
Xiang Long Yu ◽  
Quan Yang ◽  
Zheng Yi Jiang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Drop ◽  
Radiant Heat ◽  
Hot Strip Mill ◽  
Hot Strip ◽  
Radiant Heat Loss ◽  
Coiling Process ◽  
The Mathematical Model ◽  
Element Method

Using finite element method (FEM), the results of bending conditions of the intermediate plate at the bending rolls of a coilbox between the roughing and finishing stands in a hot strip mill were obtained. The intermediate plate was coiled in a coilbox, which effectively overcame the problem of temperature drop by reducing surface area exposed to radiant heat loss during the waiting period. Different states of the plate in the coilbox were simulated by FEM, and the mathematical model of the bending rolls was established, which was in accord with the simulation results that the plate was coiled. As the bending shape of the front end of the intermediate plate is crucial to coiling process, the curvatures of the plate were predicted through FEM. In addition, the roll diameter and arrangement affect the optimum curvature, thus the parameters for bending rolls were determined without many adjustments. The developed bending model has been applied to actual coilbox in plant.

Sign in / Sign up

Export Citation Format

Share Document