Hydrodynamic body shape analysis and their impact on swimming performance.

Acta Bioeng Biomech

Department of Applied Mechanics and Engineering, Sun Yat-Sen University, Guangzhou, China.

Published: October 2016

AI Article Synopsis

  • - This study uses computational fluid dynamics (CFD) to analyze how different male swimmer body shapes affect hydrodynamic performance, utilizing advanced simulation techniques.
  • - Full body models based on typical male swimmer measurements were created using CAID software, and the simulation solves the Navier-Stokes equations and captures the water surface using the VOF method.
  • - Results show that body shape significantly influences swimming efficiency, highlighting that swimmers with an inverted triangle body shape have better hydrodynamic traits for competition.

Article Abstract

This study presents the hydrodynamic characteristics of different adult male swimmer's body shape using computational fluid dynamics method. This simulation strategy is carried out by CFD fluent code with solving the 3D incompressible Navier-Stokes equations using the RNG k-ε turbulence closure. The water free surface is captured by the volume of fluid (VOF) method. A set of full body models, which is based on the anthropometrical characteristics of the most common male swimmers, is created by Computer Aided Industrial Design (CAID) software, Rhinoceros. The analysis of CFD results revealed that swimmer's body shape has a noticeable effect on the hydrodynamics performances. This explains why male swimmer with an inverted triangle body shape has good hydrodynamic characteristics for competitive swimming.

Download full-text PDF

Source

Publication Analysis

Top Keywords

body shape
16
hydrodynamic characteristics
8
swimmer's body
8
hydrodynamic body
4
shape
4
shape analysis
4
analysis impact
4
impact swimming
4
swimming performance
4
performance study
4

Similar Publications

Thermally Drawn Shape and Stiffness Programmable Fibers for Medical Devices.

Adv Healthc Mater

December 2024

Department of Metabolism, Digestion, and Reproduction, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK.

Despite the significant advantages of Shape Memory Polymers (SMPs), material processing and production challenges have limited their applications. Recent advances in fiber manufacturing offer a novel approach to processing polymers, broadening the functions of fibers beyond optical applications. In this study, a thermal drawing technique for SMPs to fabricate Shape Memory Polymer Fibers (SMPFs) tailored for medical applications, featuring programmable stiffness and shape control is developed.

View Article and Find Full Text PDF

Background: The association between different anthropometric indices, including body mass index (BMI), a body shape index (ABSI), lipid accumulation product (LAP), visceral adiposity index (VAI), waist circumference-triglyceride index (WTI), weight-adjusted waist index (WWI), body roundness index (BRI) and the prevalence of overactive bladder (OAB) is unclear. This investigation aims to explore the association among different anthropometric indices and overactive bladder as well as confounding variables.

Methods: Data were obtained from the USA National Health and Nutrition Examination Survey (NHANES) data set between 2005 and 2018, and 15231 participants were included in the study.

View Article and Find Full Text PDF

Objective: Preschool children are in a period of rapid physical development, and improving their gross motor skills and physical fitness is quite important for their health. This study aimed to investigate the effectiveness of a structured physical training program in improving Chinese preschool children's gross motor development and physical fitness.

Method: A sample of 80 children aged 4 to 5 from Fujian, China, were randomly assigned to the intervention group ( = 41), which received a 15-week structured physical training, while the control group ( = 39) continued with their daily physical activity.

View Article and Find Full Text PDF

Bioprinting has emerged as a powerful manufacturing platform for tissue engineering, enabling the fabrication of 3D living structures by assembling living cells, biological molecules, and biomaterials into these structures. Among various biomaterials, hydrogels have been increasingly used in developing bioinks suitable for 3D bioprinting for diverse human body tissues and organs. In particular, hydrogel blends combining gelatin and gelatin methacryloyl (GelMA; "GG hydrogels") receive significant attention for 3D bioprinting owing to their many advantages, such as excellent biocompatibility, biodegradability, intrinsic bioactive groups, and polymer networks that combine the thermoresponsive gelation feature of gelatin and chemically crosslinkable attribute of GelMA.

View Article and Find Full Text PDF

Short-term visual adaptation to body shape induces sustained aftereffect on body size estimation.

Vision Res

December 2024

CAS Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Brain and Cognitive Science, Beijing 100101, China.

Visual adaptation to thin or large bodies was found to shift the subjective body normality towards the adapting body shape. Here we investigated the persistency of such adaptation effect by tracking the timecourse of decay of short-term body size adaptation in young healthy Chinese women. Participants adapted to contracted or expanded body images of unfamiliar female volunteers with a top-up paradigm.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!