Development of Building CFD Model Design Process Based on BIM

Abstract

This paper proposes the design process of optimized building Computational Fluid Dynamics (CFD) model based on Building Information Modelling (BIM). The proposed method consists of five-step processes: BIM data extraction, geometry simplification, grid optimization, attribute data matching, and finally, exporting a CFD case folder for OpenFOAM. Validation is performed to evaluate the improvement of the grid model and the accuracy of the simulation result. Validation is conducted for four indoor ventilation models. The number of grids increased or decreased, according to the optimization method, but did not change significantly. On the other hand, the maximum non-orthogonality improved by up to 20.78%, according to the optimization function. This proves that it is sufficiently effective in improving the grid quality. The accuracy of the proposed method is evaluated by relative error rate with the ANSYS simulation result. The error rates for flow and temperature are evaluated. The relative error rate is less than 5% under all conditions. Therefore, the accuracy of the proposed method is verified.

Computational Fluid Dynamics of Wind Flow and Air Pollution Modelling: A Review on 3D Building Model Standards

“…Nonetheless, CityGML and BIM modelling is not compatible to directly integrate with the CFD environment, so there is a need to convert into CAD modelling [23], [37]. But, by performing this, although it is in the CAD environment, the building detailing is already following the building modelling standard and, because of the present CFD software, only supports the CAD building standard [49].…”

“…Nevertheless, the information of the SARS-CoV-2 virus needs to be included as it also has its own level of diffusivity without only focusing on the wind flow in the well-represented 3D space model. Meanwhile, Lee et al [23] studied the CFD simulation method by utilizing the BIM-based building model. The research begins with data extraction of a BIM model from an IFC file format, then moves on to simplifying the geometry of the created building model, grid optimization, and attribute data matching from the IFC data.…”

“…BIM standard, commonly related to the architecture, engineering and construction (AEC) field [22]. This is because this standard can provide complex building information not only on the generated building model but also on cost, schedule, and other information [23]. Information on building model existed in the BIM environment is too rich compared to CityGML and CAD environment.…”

A Study on the Fire Detection and Smoke Removal in Underground Utility Tunnel Using CFD

“…CFD simulates numerical analysis using the nonlinear differential equation, the Navier-stoke equation, as the governing equation and using the finite difference method. It is actively used in various fields, including mechanical, aerospace, chemical engineering, manufacturing, civil and architectural, and environmental fields [45][46][47][48][49]. In this study, a 3D grid was designed using a CFD commercial program (Fluent, Ver.…”

Towards Achieving Sustainable Development Goal-2030 Agenda-Thirteen: A Review of Technological Advances from the Built Environment Professionals

“…It is used to model and quantify airflow-related cases (including ventilation, infiltration and dispersion of the contaminants), and test the wind-built environment interactions through numerical analysis. It enables the analysis of various shapes and environmental conditions(Lee et al, 2021;Merin Abbas & Gürsel Dino, 2019). It constitutes an important tool to understand current airflow designs, to reveal present shortcomings for improved ventilation and energy performance in particular(Melendez, Reilly & Duran, 2021).…”