Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL ANALYSIS OF FLOW BEHAVIOR AND INFLUENCE OF THE REAR SLOPE ANGLE IN AN AHMED’S BODY
Submission Author:
Charles Rech , RS
Co-Authors:
Bernardo Silva da Rocha, Charles Rech, Maikson Luiz Passaia Tonatto
Presenter: Bernardo Silva da Rocha
doi://10.26678/ABCM.ENCIT2020.CIT20-0347
Abstract
Ahmed’s body is a simplified geometry of an automobile vehicle used for simulations. In this work, this concept is used to perform a fluid dynamics model of aerodynamic behavior on the vehicle surface. The aim is to evaluate the flow parameters on an Ahmed’s body model and then to test different turbulence models with the same slope angle at vehicle rear. After, the turbulence model is selected which presented the lower variation in the drag coefficient when compared to the other models. The study is made by varying the rear chamfer angle from 10º to 90º, to verify the effect in the drag coefficient. k-Ɛ RNG turbulence model get the value of 0.4066 for drag coefficient and stood out of the other, because it presented the lowest value. Thus, this model is used to study the relationship between the variation of slope angle and the drag of the vehicle, presenting values according to those described in the literature.
Keywords
drag coefficient, Ahmed’s body, aerodynamics.
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