Numerical Simulation of Turbulent Flows Using a Least Squares Based Meshless Method

Naghian, Mohammad; Lashkarbolok, Mohsen; Jabbari, Ebrahim

doi:10.1007/s40999-016-0087-1

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…The basic principle of using finite element method is that the body is divided into subdivisions or small isolated areas which are known as finite elements. Size of the stiffness matrix be determined by the number of nodes and the results are amended by increasing the number of nodes and collocation points (Jabbari 2016). Each element has governing equations in Fluent and these elements are accumulated into a global matrix.…”

Section: Solver Settingsmentioning

confidence: 99%

Effects of roof slope and wind direction on wind pressure distribution on the roof of a square plan pyramidal low-rise building using CFD simulation

Singh

Roy

2019

Int J Adv Struct Eng

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Roof shape and slope are both important parameters for the safety of a structure, especially when facing wind loads. The present study demonstrates the pressure variations due to wind load on the pyramidal roof of a square plan low-rise building with 15% wall openings through CFD (Computational Fluid Dynamics) simulation. Many studies on roofed structures have been performed in the past; however, a detailed review of the literature indicates that the majority of these studies focused on flat, hip, gable and spherical roofs only. There is a lack of research that analyses these effects on pyramidal roof buildings. ANSYS (Analysis System) ICEM (Integrated Computer Engineering and Manufacturing)-CFD and ANSYS Fluent commercial packages have been used for modelling and simulation, respectively, and ANSYS CFD Post was used to obtain the results. A realizable k-ε turbulent model was used for the pressure distribution on the roof of the building model. In the present study, twenty-four models with different roof slopes (α), i.e. 0°, 10°, 20°, and 30°, with various wind incidence angles (ϴ), i.e. 0°, 15°, 30°, 45°, 60° and 75° were investigated. The influence of roof slope and wind incidence angle are analysed in this study. Results have been represented through pressure coefficient (Cp) contours on the roof surface and velocity streamlines of the flow field of the different cases. The optimization of the roof slope may be achieved by considering different wind incidence angles for buildings so that they may better withstand wind force in a specific area. When wind pressure coefficients from building models with openings were compared with pressure coefficients from building models without openings, it was found that the pressure coefficients for building models without openings are almost twice or three times that of the pressure coefficients for models with openings.

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Section: Solver Settingsmentioning

confidence: 99%

Effects of roof slope and wind direction on wind pressure distribution on the roof of a square plan pyramidal low-rise building using CFD simulation

Singh

Roy

2019

Int J Adv Struct Eng

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“…4 Experimental results a for velocity profile and b for turbulence intensity profile [55] into minor isolated parts which are called finite elements. The stiffness matrix size is determined by only the numeral of nodes and the outcomes are amended by increasing the nodes amount and collocation points [56]. The elements collectively make an overall matrix, and each element of the matrix has governed equations in Fluent.…”

Section: Solver Settingsmentioning

confidence: 99%

CFD simulation of the wind field around pyramidal roofed single-story buildings

Singh

Roy

2019

SN Appl. Sci.

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For the structural safety to counter the wind load, the roof shape and the roof slope both the constraints play an important role. The present study demonstrates the pressure distribution on the pyramidal roofs of a pentagonal and hexagonal plan low-rise single-story building due to the wind load through CFD simulation. This type of roofed building may be considered as one of the cyclone shelters as it is shown by post-disaster studies that pyramidal roof is found better than other roof shapes to resist the wind load. The modeling of the building and the meshing of the models have been carried out in ANSYS ICEM CFD, while the simulation process has been performed in ANSYS Fluent. To obtain the results, ANSYS CFD-Post has been utilized. For the simulation of the turbulent wind flow, a realizable k-ε turbulent model is used in the present study. In the current study, ten different building models (five with pentagonal plan and five with hexagonal plan) are generated having roof angles 20°, 25°, 30°, 35° and 40°, and all are simulated for 0°-45° wind direction @15° interval. The pressure coefficient contours for different wind directions for varying roof slopes are mapped in the present study. Results show that the hexagonal pyramidal roof surface building has low-pressure coefficients and better chances of survival than the pentagonal pyramidal roof surface building.

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“…Fig. 4 shows the evaluation of mid-plane u-velocity and v-velocity profiles at Re =1 × 10 4 and K = 1.0, presenting numerical results compared with earlier literature [31 , [52] , [53] , [54] , [55] for top wall only moving with a velocity of U T =1. The excellent agreement between the existing and current studies establishes the simulation's validity.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of turbulent flow characteristics with the influence of speed ratio in a double-sided cavity

Gnanasekaran,

Satheesh

2024

MethodsX

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Numerical Simulation of Turbulent Flows Using a Least Squares Based Meshless Method

Cited by 8 publications

References 19 publications

Effects of roof slope and wind direction on wind pressure distribution on the roof of a square plan pyramidal low-rise building using CFD simulation

Effects of roof slope and wind direction on wind pressure distribution on the roof of a square plan pyramidal low-rise building using CFD simulation

CFD simulation of the wind field around pyramidal roofed single-story buildings

Numerical analysis of turbulent flow characteristics with the influence of speed ratio in a double-sided cavity

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