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3D large-scale SPH modeling of vehicle wading with GPU acceleration

Science China(Physics,Mechanics & Astronomy) 2023年第10期66卷 70-91页

作者： Huashan Zhang Xiaoxiao Li kewei feng Moubin Liu College of Engineering Peking UniversityBejing 100871China Joint Laboratory of Marine Hydrodynamics and Ocean Engineering Laoshan LaboratoryQingdao 266237China Nanchang Innovation Institute Peking UniversityNanchang 330008China Shenzhen TenFong Technology Co.Ltd. Shenzhen 518055China

Vehicle wading is a complex fluid-structure interaction(FSI) problem and has attracted great attention recently from the automotive industry, especially for electric vehicles. As a meshless Lagrangian particle method, smoothed particle hydrodynamics(SPH) is one of the most suitable candidates for simulations of vehicle wading due to its inherent advantages in modeling free surface flows, splash, and moving interfaces. Nevertheless, the inevitable neighbor query for the nearest adjacent particles among the support domain leads to considerable computational cost and thus limits its application in 3D large-scale simulations. In this work, a GPU-based SPH method is developed with an adaptive spatial sort technology for simulations of vehicle wading. In addition, a fast, easy-to-implement particle generator is presented for isotropic initialization of the complex vehicle geometry with optimal interpolation properties. A comparative study of vehicle wading on a puddle between the GPUbased SPH with two pieces of commercial software is used to verify the capability of the GPU-based SPH method in terms of convergence analysis, kinematic characteristics, and computing performance. Finally, different conditions of vehicle speeds, water depths, and puddle widths are tested to investigate the vehicle wading numerically. The results demonstrate that the adaptive spatial sort technology can significantly improve the computing performance of the GPU-based SPH method and meanwhile promotes the GPU-based SPH method to be a competitive tool for the study of 3D large-scale FSI problems including vehicle wading. Some helpful findings of the critical vehicle speed, water depth as well as boundary wall effect are also reported in this work.

关键词： vehicle wading fluid-structure interaction GPU-based SPH adaptive spatial sort technology

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Dial "120" for Emergencies

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Women of China 1994年第3期 41-,45页

作者： feng kewei ZHAO NING

AN ambulance sped along the highway to Dongling, a scenic spot in a suburb of Beijing. A few minutes earlier, Beijing Emergency Medical Center’s "120" service received a phone call from Dongling Hospital where a Japanese tourist named Ishisaka Teru had been brought in. When he was touring Dongling, he begun to sweat, felt he couldn’t breathe which developed into an arrhythmia and then he went into shock. He needed immediate medical attention.

关键词： for Emergencies

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"Fish-Scale" Boy——Li Junwei in Beijing

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Women of China 1994年第4期 20-21页

作者： feng kewei SUN MAN

AFTER a long struggle with the rare disease, ichthy-erythroderma, 12-year-old Li Junwei was eventually able to go to school. This has been his desire for years. Li was born in Gaoxiong City in Taiwan. Since infancy he... 详细信息

关键词： Li Junwei in Beijing Boy Fish-Scale

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Trip Fuels Imagination of Art Students

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Women of China 1995年第6期 25-26页

作者： feng kewei MAN SUJIE

THE colorful paintings exhibited at the China’s Art Gallery were done by the children’s painting class at the Beijing Children’s Palace. They project the innocence and joy of childhood. Little Artists Painting classes at the Children’s Palace started in 1987. To date nearly 1,000 primary school students have learned received basic painting skills. The teachers have developed a curriculum geared toward children aged 5-12. The children learn how to sketch, paint in watercolor and in oils. Many talented students have emerged from these classes to go on to win painting competitions at home and abyoad. Sun Enqi, 51, is a kind teacher who is serious about his work and has the kind of face that has been marked by the passing years. He has devoted his life to teaching children how to paint.

关键词： Trip Fuels Imagination of Art Students

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Beijing's Road Race Promotes International Friendship

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Women of China 1994年第7期 42-43页

作者： feng kewei ZHAO NING

WEARING pink relay belts, women athletes with yellow, white and black skin were waiting in order on the starting line. It was February 20, 1994, and the Ninth Great Wall Friendship Ekiden and the Fourth International Women’s Ekiden were being held in Beijing. Both the start and finish lines were located inside the National Olympic Sports Center. Passing the Second Ring Road, Chang’an Street and Tian’anmen Square, the whole course was 42.195 kilometers long, divided into six relay sections of 5, 10, 5, 10, 5, and 7.195 kilometers, according to the international standard. About 100 women athletes were taking part in the International Women’s Ekiden.

关键词： Beijing’s Road Race Promotes International Friendship

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Is the Fountain of Youth on Niujie Street?

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Women of China 1994年第9期 50-51页

作者： feng kewei ZHAO NING

NIUJIE Street, Beijingers all know, is a neighborhood populated by the Hui nationality people south Beijing. Along this one-kilometer street that is nearly 700 years old are numerous traditional, single-storey houses and courtyards made of gray brick and tile, which form a sharp contrast with the modern skyscrapers not far away. The mosque at the center of the street

关键词： Is the Fountain of Youth on Niujie Street

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Hand in Hand—Kids Helping Kids

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Women of China 1994年第10期 24-25页

作者： feng kewei LI LI

This year, on the eve of the June I International Children’s Day, the Central Committee of the Chinese Communist Youth League and the China Young Pioneers Working Committee invited 100 pairs of friends to Beijing to ... 详细信息

关键词： In Kids Helping Kids Hand in Hand

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The Secret of Ma Junren's Success

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Women of China 1994年第2期 40-41页

作者： feng kewei ZHAO NING

IN the past,athletes from African nations Or Western countries dominated track and field *** now,a Chinese team known as"Ma’S army,"has stirred a *** Junren is

关键词： In The Secret of Ma Junren’s Success

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From Circus to Schoolyard Unicycling Becoming Popular Around the World

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Women of China 1994年第9期 42-43页

作者： feng kewei LI LI

WHEN most people think of unicycles, they think about acrobats at the circus. But today unicycles are appearing everywhere, ridden by everyday people. Since the 1940s more and more of these one wheeled cycles have made the crossover from stage to sports ground. It has become popular in more than 200 countries and regions. In the early 1980s, the World Unicycle Union was established and people from 220 countries and regions became members. Six

关键词： From Circus to Schoolyard Unicycling Becoming Popular Around the World In

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Women Athletes Climb the Heights

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Women of China 1994年第1期 41-42页

作者： feng kewei JIN LAN

Wang Junxia—Super Runner Running like a deer on the track at full speed, Wang Junxia dashed to the finish line among the audience’s thunderous applause and cheers. She won t he 10,000-meter long distance event in 29:31.78 at the Seventh National Games in Beijing on September 8, 1993—a full 42 seconds faster than the 30:31.74 world record set by the Norwegian Ingrid Kristiansen in July 1986 and her

关键词： Women Athletes Climb the Heights

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