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Experimental and numerical investigation of the wake flow of a human-shaped manikin: Experiments by PIV and simulations by CFD

  • Research Article
  • Indoor/Outdoor Airflow and Air Quality
  • Published:
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Abstract

High-quality measurements of the flow structures induced by human movements are important for analyzing indoor air quality. This study measures the longitudinal and cross-sectional velocity and vortex fields behind the moving body, and investigates the effect of movement and body-shape on a wake flow structure. Experiments were conducted in a small-scale chamber with a moving human-shaped manikin, measured by the particle image velocimetry technique. The dynamic changes of the movement-induced wake flow were compared both in different times and movement stages. A strong downward airflow and an upward vortex were observed following the moving body. The measurements also revealed symmetric downward and expansive vortices in the wake flow. During the movement, a longitudinal recirculation region can be predicted around the manikin. Compared with a moving cylinder, this study shows that the specific shape of the legs exerts an obvious impact on the flow behind the lower limbs. In particular, a horizontal flow was observed penetrating from between the legs, with a velocity of 0.5 m/s, which was equal to the moving speed of the manikin. Meanwhile, a computational fluid dynamic model was also employed to simulate the unsteady instantaneous flow affected by the human movement. The numerical results can reveal different stages of the wake generation, development, and decay in detail during the movement. By quantitatively comparing with the experimental data, the LES method has rendered a good alignment with the experimental result, not only in the velocity magnitude value but also in fluctuating quantity.

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References

  • Afgan I, Kahil Y, Benhamadouche S, Sagaut P (2011). Large eddy simulation of the flow around single and two side-by-side cylinders at subcritical Reynolds numbers. Physics of Fluids, 23: 875–884.

    Article  Google Scholar 

  • Brohus H, Balling KD, Jeppesen D (2006). Influence of movements on contaminant transport in an operating room. Indoor Air, 16: 356–372.

    Article  Google Scholar 

  • Cao X, Liu J, Jiang N, Chen Q (2014). Particle image velocimetry measurement of indoor airflow field: A review of the technologies and applications. Energy and Buildings, 69: 367–380.

    Article  Google Scholar 

  • Chen Q (2009). Ventilation performance prediction for buildings: A method overview and recent applications. Building and Environment, 44: 848–858.

    Article  Google Scholar 

  • Cheng Y, Lin Z (2016). Experimental investigation into the interaction between the human body and room airflow and its effect on thermal comfort under stratum ventilation. Indoor Air, 26: 274–285.

    Article  Google Scholar 

  • Choi JI, Edwards JR (2008). Large eddy simulation and zonal modeling of human-induced contaminant transport. Indoor Air, 18: 233–249.

    Article  Google Scholar 

  • Edge BA, Paterson EG, Settle GS (2005). Computational study of the wake and contaminant transport of a walking human. Journal of Fluids Engineering, 127: 967–977.

    Article  Google Scholar 

  • Elhimer M, Harran G, Hoarau Y, Cazin S, Marchal M, Braza M (2016). Coherent and turbulent processes in the bistable regime around a tandem of cylinders including reattached flow dynamics by means of high-speed PIV. Journal of Fluids and Structures, 60: 62–79.

    Article  Google Scholar 

  • Fisk WJ, Black D, Brunner G (2012). Changing ventilation rates in U.S. offices: Implications for health, work performance, energy, and associated economics. Building and Environment, 47: 368–372.

    Google Scholar 

  • Han Z, Weng W, Huang Q (2014). Numerical and experimental investigation on the dynamic airflow of human movement in a full-scale cabin. HVAC&R Research, 20: 444–457.

    Article  Google Scholar 

  • Karava P, Stathopoulos T, Athienitis AK (2011). Airflow assessment in cross-ventilated buildings with operable façade elements. Building and Environment, 46: 266–297.

    Article  Google Scholar 

  • Kuznik F, Rusaouën G, Brau J (2007). Experimental and numerical study of a full scale ventilated enclosure: Comparison of four two equations closure turbulence models. Building and Environment, 42: 1043–1053.

    Article  Google Scholar 

  • Lakehal D, Rodi W (1997). Calculation of the flow past a surface-mounted cube with two-layer turbulence models. Journal of Wind Engineering and Industrial Aerodynamics, 67: 65–78.

    Article  Google Scholar 

  • Li A, Chen X, Chen L, Gao R (2014). Study on local drag reduction effects of wedge-shaped components in elbow and T-junction close-coupled pipes. Building Simulation, 7: 175–184.

    Article  Google Scholar 

  • Li YZ, He WZ (2006). Engineering Fluid Mechanics. Beijing: Tsinghua University Press. (in Chinese)

    Google Scholar 

  • Liang W, Qin M (2017). A simulation study of ventilation and indoor gaseous pollutant transport under different window/door opening behaviors. Building Simulation, 10: 395–405.

    Article  Google Scholar 

  • Licina D, Melikov A, Sekhar C, Tham KW (2015). Human convective boundary layer and its interaction with room ventilation flow. Indoor Air, 25: 21–35.

    Article  Google Scholar 

  • Luo N, Weng W, Xu X, Fu M (2017). Human-walking-induced wake flow—PIV experiments and CFD simulations. Indoor and Built Environment, https://doi.org/10.1177/1420326X17701279.

    Google Scholar 

  • Lysenko DA, Ertesvåg IS, Rian KE (2012). Large-Eddy Simulation of the flow over a circular cylinder at Reynolds number 3900 using the OpenFOAM Toolbox. Flow, Turbulence and Combustion, 89: 491–518.

    Article  Google Scholar 

  • Madureira J, Paciência I, Rufo J, Ramos E, Barros H, Teixeira J P, de Oliveira Fernandes E (2015). Indoor air quality in schools and its relationship with children’s respiratory symptoms. Atmospheric Environment, 118: 145–156.

    Article  Google Scholar 

  • Mazumdar S, Poussou SB, Lin C-H, Isukapalli SS, Plesniak MW, Chen Q (2011). Impact of scaling and body movement on contaminant transport in airliner cabins. Atmospheric Environment, 45: 6019–6028.

    Article  Google Scholar 

  • Meneghini JR, Saltara F, Siqueira CLR, Ferrari JA (2001). Numerical simulation of flow interference between two circular cylinders in tandem and side-by-side arrangements. Journal of Fluids and Structures, 15: 327–350.

    Article  Google Scholar 

  • Okamoto S, Sunabashiri Y (1992). Vortex shedding from a circular cylinder of finite length placed on a ground plane. Journal of Fluids Engineering, 114: 512–521.

    Article  Google Scholar 

  • Phuong NL, Ito K (2015). Investigation of flow pattern in upper human airway including oral and nasal inhalation by PIV and CFD. Building and Environment, 94: 504–515.

    Article  Google Scholar 

  • Phuong NL, Yamashita M, Yoo SJ, Ito K (2016). Prediction of convective heat transfer coefficient of human upper and lower airway surfaces in steady and unsteady breathing conditions. Building and Environment, 100: 172–185.

    Article  Google Scholar 

  • Poussou SB, Mazumdar S, Plesniak MW, Sojka PE, Chen Q (2010). Flow and contaminant transport in an airliner cabin induced by a moving body: Model experiments and CFD predictions. Atmospheric Environment, 44: 2830–2839.

    Article  Google Scholar 

  • Qian J, Peccia J, Ferro AR (2014). Walking-induced particle resuspension in indoor environments. Atmospheric Environment, 89: 464–481.

    Article  Google Scholar 

  • Rai AC, Lin C-H, Chen Q (2015). Numerical modeling of particle generation from ozone reactions with human-worn clothing in indoor environments. Atmospheric Environment, 102: 145–155.

    Article  Google Scholar 

  • Roache PJ (1994). Perspective: A method for uniform reporting of grid refinement studies. Journal of Fluids Engineering, 116: 405–413.

    Article  Google Scholar 

  • Richmond-Bryant J, Eisner AD, Brixey LA, Wiener RW (2006). Transport of airborne particles within a room. Indoor Air, 16: 48–55.

    Article  Google Scholar 

  • Shih Y-C, Chic C-C, Wang O (2007). Dynamic airflow simulation within an isolation room. Building and Environment, 42: 3194–3209.

    Article  Google Scholar 

  • Settles GS (2006). Fluid mechanics and homeland security. Annual Review of Fluid Mechanics, 38: 87–110.

    Article  MATH  Google Scholar 

  • Sumner D (2010). Two circular cylinders in cross-flow: A review. Journal of Fluids and Structures, 26: 849–899.

    Article  Google Scholar 

  • Sumner D, Wong SST, Price SJ, Païdoussis MP (1999). Fluid behavior of side-by-side circular cylinders in steady cross-flow. Journal of Fluids and Structures, 13: 309–338.

    Article  Google Scholar 

  • Taheri M, Schuss M, Fail A, Mahdavi A (2016). A performance assessment of an office space with displacement, personal, and natural ventilation systems. Building Simulation, 9: 89–100.

    Article  Google Scholar 

  • Voelker C, Maempel S, Kornadt O (2014). Measuring the human body’s microclimate using a thermal manikin. Indoor Air, 24: 567–579.

    Article  Google Scholar 

  • Wang M, Chen Q (2009). Assessment of various turbulence models for transitional flows in an enclosed environment (RP-1271). HVAC&R Research, 15: 1099–1119.

    Article  Google Scholar 

  • Wang J, Chow T-T (2014). Influence of human movement on the transport of airborne infectious particles in hospital. Journal of Building Performance Simulation, 8: 205–215.

    Article  Google Scholar 

  • Yan Y, Li X, Tu J (2017). Numerical investigations of the effects of manikin simplifications on the thermal flow field in indoor spaces. Building Simulation, 10: 219–227.

    Article  Google Scholar 

  • Zhang X, Ahmadi G, Qian J, Ferro A (2008). Particle detachment, resuspension and transport due to human walking in indoor environments. Journal of Adhesion Science and Technology, 22: 591–621.

    Article  Google Scholar 

  • Zhang Z, Chen X, Mazumdar A, Zhang T, Chen Q (2009). Experimental and numerical investigation of airflow and contaminant transport in an airliner cabin mockup. Building and Environment, 44: 85–94.

    Article  Google Scholar 

Download references

Acknowledgements

This study was supported by the National Key R&D Program of China (No. 2016YFC0802801 and No. 2016YFC0802807), National Science Fund for Distinguished Young Scholars of China (No. 71725006). The authors are deeply grateful to these supports.

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Authors and Affiliations

  1. Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing, 100084, China

    Na Luo, Wenguo Weng & Xiaoyu Xu

  2. Beijing Key Laboratory of City Integrated Emergency Response Science, Tsinghua University, Beijing, 100084, China

    Na Luo, Wenguo Weng & Xiaoyu Xu

  3. Hefei Institute for Public Safety Research, Tsinghua University, Hefei, Anhui Province, 320601, China

    Ming Fu

Authors
  1. Na Luo
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  2. Wenguo Weng
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  3. Xiaoyu Xu
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  4. Ming Fu
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Correspondence to Wenguo Weng.

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Luo, N., Weng, W., Xu, X. et al. Experimental and numerical investigation of the wake flow of a human-shaped manikin: Experiments by PIV and simulations by CFD. Build. Simul. 11, 1189–1205 (2018). https://doi.org/10.1007/s12273-018-0446-8

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  • DOI: https://doi.org/10.1007/s12273-018-0446-8

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