CFD Simulation On The Pressure Distribution For An Isolated Single-Story House With Extension: Grid Sensitivity Analysis

Yahya, Waled; Zaini, S. S.; Ismail, Mohd Nazari; Majid, Taksiah A.; Deraman, S. N. C.; Abdullah, Jeffrey

doi:10.1088/1755-1315/140/1/012005

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…Accuracy and analysis time are important issues in computational fluid dynamics (CFD) simulations, and both are strongly influenced by the grid [ 24 ]. After forming a tetrahedral grid using ANSYS Meshing and ANSYS Fluent, it was applied by changing it to a polyhedral grid.…”

Section: Methodsmentioning

confidence: 99%

Numerical Investigation of Overtopping Prevention for Optimal Safety Dike Design

Son

Kim

Min

et al. 2022

IJERPH

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Leakage accidents at chemical facilities have a negative impact on both the environment and human life, and the government has established and implemented regulations on dikes in order to minimize such accidents. However, the overtopping phenomenon in which chemicals overflow the dike due to catastrophic leakage requires additional safeguards. In this study, the mitigation effect was confirmed by simulating tanks and dikes using various deflector plates to minimize the effect of spilled chemicals. ANSYS Fluent 19.1, a computational fluid dynamics program, was used, and the overtopping effect was compared with a dike design that satisfies the safety regulations using a volume of fluid (VOF) model that analyzes multiphase flow through a surface tracking technique. Nitric acid and sulfuric acid were used in the study; they were selected because they are frequently involved in leakage accidents. In the event of a leak in a liquid tank, a dike with a deflector plate was very effective in reducing overtopping, and a deflector at a 45° angle was more effective than a 30° deflector. However, it is necessary to install additional safeguards at the joint between the dike and the deflection plate to withstand the force of the liquid.

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Section: Methodsmentioning

confidence: 99%

Numerical Investigation of Overtopping Prevention for Optimal Safety Dike Design

Son

Kim

Min

et al. 2022

IJERPH

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“…Because of the high expense associated with long CFD execution times, CFD end-users use refining and coarsening of the grid resolution as a method for changing the number of calculations that the simulation is doing and this causes a change in the amount of data produced, which, in turn, alters the run time of the simulation executions. CFD end-users use the idea of reducing the number of elements used for simulation calculations or grid resolution coarsening to speed up simulation executions and total simulation workflows (Yahya et al , 2018). This can be thought of as a form of spatial or systematic sampling.…”

Section: Background and Related Workmentioning

confidence: 99%

Modelling the effect of computation sampling on insight error in computational fluid dynamics scientific simulation

Masiane

Jacques

Feng

et al. 2020

JEDT

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Purpose The purpose of this paper is to collect data from humans as they generate insights from the visualised results of computational fluid dynamics (CFD) scientific simulation. The authors hypothesise the behaviour of their insight errors (IEs) and proceed to quantify the IEs provided by the crowd participants. They then use the insight framework to model the behaviours of the errors. Using the crowd responses and models from the framework, they test the hypotheses and use the results to validate the framework for the speedup of CFD applications. Design/methodology/approach The authors use a randomised between-subjects experiment with blocking. CFD grid resolution is the independent variable while IE is the dependent variable. The experiment has one treatment factor with five levels. In case varying timestamps has an effect on insight variance levels, the authors block the responses by timestep. In total, 150 participants are randomly assigned to one of five groups and also randomly assigned to one of five blocks within a treatment. Participants are asked to complete a benchmark and open-ended task. Findings The authors find that the variances of insight and perception errors have a U-shaped relationship with grid resolution, that similar to the previously studied visualisation applications, the IE framework is valid for insights generated from CFD results and grid resolution can be used to predict the variance of IE resulting from observing CFD post-processing results. Originality/value To the best of the authors’ knowledge, no other work has measured IE variance to present it to simulation users so that they can use it as a feedback metric for selecting the ideal grid resolution when using grid resolution to speedup CFD simulation.

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Designing nature-inspired swimming gloves: a biomimicry design spiral approach

Purwaningsih,

Nurkertamanda,

Ulkhaq

et al. 2024

Cogent Engineering

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CFD Simulation On The Pressure Distribution For An Isolated Single-Story House With Extension: Grid Sensitivity Analysis

Cited by 3 publications

References 10 publications

Numerical Investigation of Overtopping Prevention for Optimal Safety Dike Design

Numerical Investigation of Overtopping Prevention for Optimal Safety Dike Design

Modelling the effect of computation sampling on insight error in computational fluid dynamics scientific simulation

Designing nature-inspired swimming gloves: a biomimicry design spiral approach

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