Water Ingestion and Pressure Analysis of Automotive Vehicles Using Multiphase CFD

Buscariolo, Filipe Fabian; Volpe, Leonardo José Della

doi:10.5151/engpro-simea2014-28

Cited by 3 publications

(12 citation statements)

References 3 publications

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“…The proposed methodology in this work is based on BUSCARIOLO and VOLPE (2014) [1] work, using correlation of the physical test with proposed multiphase CFD simulation for water path over the vehicle's roof until the roof ditch.…”

Section: Methodsmentioning

confidence: 99%

“…Based on BUSCARIOLO and VOLPE (2014) [1] work, for the model configuration of the multiphase, it was considered the Volume of Fluid (VOF) method which is a numerical technique for tracking and locating the free surface. It belongs to the class of Eulerian methods which are characterized by a mesh that is either stationary or is moving in a certain prescribed manner to accommodate the evolving shape of the interface.…”

Section: Model Additional Considerationsmentioning

confidence: 99%

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Multiphase Water Flow Simulation of a Vehicle's Roof

Buscariolo¹,

Budavari²,

Mantovani³

et al. 2014

SAE Technical Paper Series

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Considering the increment of computational power and the accuracy on the results, virtual engineering tools are becoming more popular among the industries, especially inside the automotive, seeking development time and cost reduction. Taking advantage of the modern resources, it was developed a simulation methodology in order to verify the water flow behavior from the roof to the side ditch of the vehicle's roof. Within this methodology it is possible to virtually test a vehicle without a real prototype, analyze the roof performance and suggest design changes without any prototype part being made, which implies in cost and development time reduction.

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Section: Methodsmentioning

confidence: 99%

Section: Model Additional Considerationsmentioning

confidence: 99%

Multiphase Water Flow Simulation of a Vehicle's Roof

Buscariolo¹,

Budavari²,

Mantovani³

et al. 2014

SAE Technical Paper Series

Self Cite

View full text Add to dashboard Cite

show abstract

“…The methodology proposed to this work is based on BUSCARIOLO and VOLPE (2014) [2] work, using correlation of the physical test with proposed multiphase CFD simulation for water path but now replacing the fluid by mud. In this case, the mud deposition will be analyzed only virtually.…”

Section: Methodsmentioning

confidence: 99%

“…A schematic representation of the tunnel inlet is shown below. CFD simulations were performed considering half of regular production car, in order to save computational time due to the main focus on the AIS, similar to approach used by BUSCARIOLO and VOLPE (2014) [2]. The simulation considered vehicle with rotating wheels, CRFM drop pressures and full underhood representation, assembled in a virtual Wind Tunnel, with dimensions similar to GM Wind Tunnel [6], once it has width similar to regular a street.…”

Section: Methodsmentioning

confidence: 99%

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Mud Deposition Simulation at the CRFM of an Automobile Using CFD Simulation

Buscariolo¹,

Alves²,

Volpe³

2014

Anais Do XXII Simpósio Internacional De Engenharia Automotiva

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CFD is becoming very popular among the industries and the use of multiphase simulations is also increasing with more powerful CPUs and reliable CFD codes. The scope of this work is to present a mud deposition simulation methodology using CFD multiphase analysis at the CRFM of an automobile, in order to prevent low performance on the condenser or on the radiator and compromise the heat exchange performance. Mud reaches the front end of the car and results show the mud path and mud deposition on the CRFM and the blocked area.

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Inundaciones urbanas : criterios de peligrosidad y evaluación del riesgo para peatones y vehículos

Martínez Gomariz

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In this research work, an analysis is first undertaken on the hazard regarding people exposed to floods in urban areas. Several experiments with people were carried out in order to determine the stability limit to pedestrians, with physical characteristics previously established, crossing through a water flow. This study was complemented by including surveys on the tested people regarding their feelings during the tests. The aim was to evaluate the adequacy of the tests and more especially to figure out the stability feelings of every person under different hydraulic conditions (water depths and velocities). Vehicles are essential components related to impacts in cities when importants floods occurs, considering that direct tangible damages (impacts either on the vehicles themselves or on other urban structures), indirect tangible damages (traffic interruption) and indirect intangible damages (impacts on pedestrians) may be caused by important flash flood events. After losing the stability vehicles are swept away by the water flow as if they were huge debris. Therefore, it is essential to have suitable tools to evaluate the stability of different types of vehicles (shapes and weights) under different hydraulic conditions (water depths and velocities). Herein, tools to evaluate the stability of vehicles exposed to floods are provided, which have been developed carrying out experimental tests using a sample of vehicles with different scales. Together with the conducted experimental studies, several three-dimensional simulations were carried out. Hardly-measurable variables were obtained due to those simulations which allowed analysing the phenomenon in more depth. The critical friction coefficient was estimated for a tested subject, based on the forces obtained through the conducted simulations. A numerical validation of the proposed experimental threshold was performed for one of the tested vehicles. It opens a wide research field in the pedestrians and vehicles stability studies based on the employment of numerical tools. Lastly, a case study is presented where hazard and risk criteria based on the conducted stability experiments are applied. A new methodoly for the economic damages estimation for vehicles when those are exposed to flooding is presented and applied as well within the case study. In summary, experimental results are presented here, complemented with numerical simulations, and are applied together into a real case, thereby providing valued information according to the final target, flood risk management in urban areas. En este trabajo de investigación se ha analizado en primer lugar la peligrosidad a la que se ven expuestas las personas durante eventos de inundación en zona urbana, estudiando los límites de estabilidad de éstas, cuando cruzan a través de una corriente de agua, a partir de ensayos experimentales con personas de ciertas características escogidas previamente. Éste estudio se ha complementado con encuestas realizadas a las personas ensayadas, de forma que se pueda evaluar la idoneidad de los ensayos y sobretodo la sensación de estabilidad que presentaba cada sujeto ensayado para las diferentes condiciones hidráulicas (calados y velocidades) a las que se veían sometidos. Los vehículos son componentes esenciales en las afectaciones producidas en una ciudad ante importantes inundaciones ya que pueden producir daños directos tangibles (viéndose afectados los propios vehículos o colisionando sobre otros elementos urbanos), daños indirectos tangibles (derivados de la interrupción del tráfico) y daños indirectos intangibles (afectaciones a personas). Éstos, al perder la estabilidad, terminan siendo grandes escombros arrastrados por el agua, con lo cual resulta imprescindible disponer de herramientas para evaluar su estabilidad ante diferentes condiciones hidráulicas (calados y velocidades) y para diferentes tipologías de vehículos (formas y pesos). En este documento se ofrecen herramientas para evaluar la estabilidad de los vehículos, habiéndose llevado a cabo ensayos experimentales con vehículos de diferentes características a escalas que permitian ser ensayados en un canal de 0.6 m de ancho. En combinación con los estudios experimentales, se llevan a cabo simulaciones numéricas tridimensionales con las que se obtienen resultados (fuerzas actuantes) difícilmente medibles en laboratotio. Es posible estimar el coeficiente de rozamiento que produjo una inestabilidad de un sujeto ensayado en laboratorio, así como validar numéricamente el umbral de estabilidad de un vehículo ensayado. Se abre un amplio campo de investigación basado en herramientas numéricas para el análisis de la estabilidad de personas y vehículos. Por último se presenta un caso de estudio en el que aplican criterios de peligrosidad y riesgo basados en los estudios experimentales de estabilidad para peatones y vehículos. Se propone y se aplica una metodología para estimar los daños ocasionados a vehículos, derivados de una cierta inundación. En definitiva, en este trabajo de investigación se presentan resultados fundamentados experimentalmente, complementados con simulaciones numéricas y aplicados conjuntamente a un caso real, que aportan información de gran valor para el objetivo final, la gestión del riesgo de inundaciones en zonas urbanas.

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Water Ingestion and Pressure Analysis of Automotive Vehicles Using Multiphase CFD

Cited by 3 publications

References 3 publications

Multiphase Water Flow Simulation of a Vehicle's Roof

Multiphase Water Flow Simulation of a Vehicle's Roof

Mud Deposition Simulation at the CRFM of an Automobile Using CFD Simulation

Inundaciones urbanas : criterios de peligrosidad y evaluación del riesgo para peatones y vehículos

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