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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL
Sanjaya, Yongky
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Civil Engineering, Building, Construction & Architecture

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Pemodelan Numerik Aliran Angin di Sekitar Gedung Tinggi Menggunakan Metode RANS Standard K-ε dengan Program OpenFOAM Sanjaya, Yongky; Priambodo, Doni; Sarli, Prasanti Widyasih; Setio, Herlien Dwiarti; Syariefatunnisa, Syariefatunnisa
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 28, Nomor 1 (2022)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1052.967 KB) | DOI: 10.14710/mkts.v28i1.37375

Abstract

Amplified wind loads around buildings could induce structural failure, thus making it important to understand the behavior of fluid flow between buildings. In this study, the analysis is performed using RANS, a computational fluid dynamics (CFD) simulation with faster computation time compared to other methods. OpenFOAM, an open-source software, is used to run the simulations. This study used a structured mesh with standard RANS k − ε turbulence model. Four symmetrical buildings with a scale of 1: 420 are used as the model of this study. Numerical modelling of different computational domain size and different degrees of fineness of the meshing is simulated to determine margin of errors. The result indicates that changes in computational domain has a significant effect on CFD analysis in lowering the error value in area with high flow speed ratio (U/U0> 1) to reach the acceptable error limit. Contrastingly, changes in the degree of fineness of the meshing do not give a significant change in error value. A relatively coarse meshing with fast computation time could give a similar result as A fine meshing model with longer computation time.
Permodelan Numerik Aliran Angin Pada Jalan Antara Bangunan Tinggi Dengan Modifikasi Sudut Datang Priambodo, Doni; Sanjaya, Yongky; Sarli, Prasanti Widyasih; Setio, Herlien Dwiarti
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 28, Nomor 2 (2022)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v28i2.37220

Abstract

In fluid dynamics analysis, one of the things to do is to perform numerical modeling validated on the resultsof experimentation. In numerical modeling of wind flow there are several forms of modeling used includingRANS, LES, DNS, etc. where the modeling has its own advantages and disadvantages. Among these models,RANS is a model that has the cheapest computer expense compared to other models so that it has the highestworkability. Therefore, rans method testing (Reynolds Averaged Navier Stokes) was conducted to determinethe capability of turbulence models in checking wind speed contours on the road between 4 simplesymmetrical tall buildings with 0o, 30o, and 45o attack an gles validated with the results ofexperimentation. This research was conducted using RANS modeling (Reynolds Averaged Navier Stokes) andstandard turbulence model k-ε and validated using Low Speed Wind Tunnel and PIV (Particle ImageVelocimetry). According to the results of the test, U/Uo wind speed conditions obtained in wind modelingwith RANS and k-ε standards have errors that are still acceptable.
Co-Authors Doni Priambodo Sarli, Prasanti Widyasih Setio, Herlien Dwiarti Syariefatunnisa, Syariefatunnisa