Studi Sensitivitas Aliran Dalam Kanal Terbuka Menggunakan Pendekatan Komputasi Dinamika Fluida Model Turbulen K-Epsilon
DOI:
https://doi.org/10.26418/pf.v9i2.49488Abstract
Penelitian ini dilakukan untuk menganalisis secara numerik sensitivitas aliran air dalam kanal terbuka menggunakan pendekatan komputasi dinamika fluida dengan bantuan perangkat lunak open source OpenFOAM yang menerapkan model turbulen RANS K-Epsilon. Simulasi aliran air dibangun dengan mengikuti tahapan eksperimen yang telah dilakukan oleh Coleman (1986). Simulasi aliran air berhasil dibangun yang ditunjukkan dengan pola grafik profil kecepatan aliran air yang mendekati data acuan eksperimen Coleman (1986) dan persamaan analitik Logarithmic Law pada ukuran grid irreguler Δx = 0,004 dan Δy = 0,01 m dan nilai k = 0,003. Nilai koefisien korelasi dan error yang didapat masing-masing adalah 0,996 dan 1,01 %. Berdasarkan hasil yang telah diperoleh, disimpulkan bahwa aliran air dalam sebuah kanal terbuka dapat disimulasikan menggunakan pendekatan komputasi dinamika fluida yang menerapkan model turbulen RANS K-Epsilon. Profil distribusi kecepatan air yang dihasilkan dalam simulasi ini telah menunjukkan kesamaan fisis dengan konsep mekanika fluia, yaitu kecepatan di dasar lebih rendah dibandingkan kecapatan di permukaan.
Kata kunci: Aliran kanal terbuka, RANS K-Epsilon, OpenFOAM, Komputasi dinamika fluida
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Date: 24-05-2023
Prisma Fisika
Email: prismafisika@physics.untan.ac.id
