Article Per Year (5 Year)
p-Index From 2020 - 2025
0.23
P-Index
This Author published in this journals
All Journal Elkom: Jurnal Elektronika dan Komputer Jurnal Matematika & Sains
Ishak Hashim
Centre for Modeling and Data Analysis, School of Mathematical Sciences, Universiti Kebangsaan Malaysia
Education Mathematics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Solutions of Natural Convection of Nanofluids in a Parallelogrammic Enclosure by Finite Difference Method Habibis Saleh; Sri Basriati; Ishak Hashim
Jurnal Matematika & Sains Vol 16, No 2 (2011)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Detailed numerical calculations for heat transfer enhancement utilizing nanofluids in a parallelogrammic enclosure are presented in this paper. The sloping walls are maintained isothermally at different temperatures. The top and bottom horizontal straight walls are kept adiabatic. To simplify the effort in matching the grid mesh with the sloping walls of the parallelogram, the computational domain is mapped onto a rectangular shape using a non-linear axis transformation. Transport equations are modeled by a stream-vorticity formulation and are solved numerically by finite difference method. Based upon the numerical predictions, the effect of the base angle of the parallelogrammic enclosure on flow and temperature pattern and the heat transfer rate within the enclosure are presented. Increasing the base angle was found to decrease the heat transfer rate. Keywords: Numerical method, Natural convection, Nanofluids.   Solusi Konveksi Alami Fluida Nano dalam Bangun Jajaran Genjang Tertutup Menggunakan Metode Elemen Hingga Abstrak Dalam makalah ini disajikan perhitungan numerik secara rinci untuk permasalahan peningkatan perpindahan kalor memanfaatkan fluida nano dalam bangun jajarangenjang tertutup. Kedua sisi miring jajarangenjang tersebut dipertahankan  isotermal pada suhu yang berbeda. Sisi atas dan bawahnya dipertahankan dalam keadaan adiabatik. Untuk menyederhanakan usaha dalam menyesuaikan jaring-grid dengan sisi-sisi miring jajarangenjang, domain komputasi dipetakan ke bentuk persegi panjang menggunakan transformasi sumbu tidak linear. Persamaan-persamaan transport dimodelkan dengan rumus aliran-pusaran dan diselesaikan menggunakan metode beda hingga. Berdasarkan prediksi numerik, pengaruh dari sudut dasar jajarangenjang  pada pola aliran dan suhu dan juga tingkat perpindahan kalor dalam jajarangenjang disajikan. Disimpulkan bahwa pembesaran sudut dasar jajarangenjang didapati menurunkan tingkat perpindahan kalor. Kata kunci: Metode numerik, Konveksi alami, Fluida nano.
Simulation of The Temperature Profile of The Curing Process of Thick Carbon Fiber Laminates Using The Age Algorithm Amna Amna; Ahmad Kamal bin Zulkifle; Norma Alias; Norhalena Mohd. Nor; Noreliza Abu Mansor; Ishak Hashim
Elkom : Jurnal Elektronika dan Komputer Vol 13 No 1 (2020): Juli: Jurnal Elektronika dan Komputer
Publisher : STEKOM PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/elkom.v13i1.11

Abstract

This paper determines by simulation the temperature profiles of a thick carbon fiber/epoxy laminate during its cure process. The one-dimensional model of heat transfer is solved by using a finite difference numerical scheme. In the process, the same physical and thermal properties of materials used by ZhanSheng et al. are employed. The temperature is calculated through a judicious formulation and application of the Alternating Group Explicit (AGE) iterative method developed by Evans and Sahimi. A fourthorder Runge Kutta method is applied for the cure. The AGE scheme proves to be a viable iterative method with respect to stability, efficiency and rate of convergence.
Co-Authors Ahmad Kamal bin Zulkifle Amna Habibis Saleh Noreliza Abu Mansor Norhalena Mohd. Nor Norma Alias Sri Basriati