Indoor air distribution has great impact on people-s thermal sensation. Therefore, how to remove the indoor excess heat becomes an important issue to create a thermally comfortable indoor environment. To expel the extra indoor heat effectively, this paper used a dynamic CFD approach to study the effect of an air-supply guide vane swinging periodically on the indoor air distribution within a model room. The numerical results revealed that the indoor heat transfer performance caused by the swing guide vane had close relation with the number of vortices developing under the inlet cold jet. At larger swing amplitude, two smaller vortices continued to shed outward under the cold jet and remove the indoor heat load more effectively. As a result, it can be found that the average Nusselt number on the floor increased with the increase of the swing amplitude of the guide vane.<\/p>\r\n","references":"[1] ISO 7730, Ergonomics of the Thermal Environment - Analytical Determination and Interpretation of Thermal Comfort Using Calculation\r\nof the PMV and PPD Indices and Local Thermal Comfort Criteria, 2005.\r\n[2] ANSI\/ASHRAE 55, Thermal Environmental Conditions for Human\r\nOccupancy, 2004.\r\n[3] P. V. Nielsen, A. Restivo, and J. H. Whitelaw, \"The Velocity\r\nCharacteristics of Ventilated Rooms,\" J. Fluids Engineering, vol. 100, pp.\r\n291-298, 1978.\r\n[4] P. V. Nielson, \"The Selection of Turbulence Models for Prediction of\r\nRoom Airflow,\" ASHRAE Trans., vol. 104, Part. 1B, pp. 1119-1127,\r\n1998.\r\n[5] H. B. Awbi, \"Application of Computational Fluid Dynamics in Room\r\nVentilation,\" Building and Environment, vol. 24, pp. 73-84, 1989.\r\n[6] Awbi, H.B., Ventilation of Buildings, 1st Edition, E & FN SPON, 1991.\r\n[7] Q. Chen, \"Computational fluid dynamics for HVAC: success and\r\nfailures,\" ASHRAE Transaction, vol. 103(1), pp. 178-187, 1992a.\r\n[8] Q. Chen, \"Significant Questions in Predicting Room Air Motion,\"\r\nASHRAE Transaction, vol. 98, Part. 1, pp. 927-939, 1992b.\r\n[9] Q. Chen, and L. R. Glicksman, \"Simplified Methodology to Factor Room\r\nAir Movement and the Impact on Thermal Comfort into Design of\r\nRadiative, Convective and Hybrid Heating and Cooling Systems,\"\r\nASHRAE report: RP-927, 1999.\r\n[10] Q. Chen, \"Ventilation performance prediction for buildings: A method\r\noverview and recent applications,\" Building and Environment, vol. 44,\r\npp. 848-858, 2009.\r\n[11] S. Murakami, M. Kaizuka, H. Yoshino, and S. Kato, Room air convection\r\nand ventilation effectiveness, American Society of Heating, Refrigeration\r\nand Air-Conditioning Engineers, Inc. USA., 1992.\r\n[12] S. Murakami, S. Kato, and R. Ooka, \"Comparison of Numerical\r\nPredictions of Horizontal Nonisothermal Jet in a Room with Three\r\nTurbulence Models- k-\u256c\u00c1, EVM, ASM, and DSM\", ASHRAE Transaction,\r\nvol. 100, Part. 2, pp. 697-704, 1994.\r\n[13] Y. Li, and L. Baldacchino, \"Implementation of some higher-order\r\nconvection schemes on non-uniform grids,\" International Journal for\r\nNumerical Methods in Fluids, vol. 21, pp. 1201-1220, 1995.\r\n[14] W. Xu, Q. Chen, and F. T. M. Nieuwstadt, \"A New Turbulence Model for\r\nNear-Wall Natural Convection\", International Journal of Heat and Mass\r\nTransfer, vol. 41, pp. 3161-3176, 1998.\r\n[15] Q.-H. Deng, and G.-F. Tang, \"Numerical visualization of mass and heat\r\ntransport for mixed convective heat transfer by streamline and heatline,\"\r\nInt. J. Heat Mass Trans., vol. 45, pp. 2387-2396, 2002.\r\n[16] G. Gan, \"Evaluation of Room Air Distribution Systems Using\r\nComputational Fluid Dynamics,\" Energy and Buildings, Vol.23, pp.\r\n83-93, 1995.\r\n[17] S. M. Saeidi, and J. M. Khodadadi, \"Forced convection in a square cavity\r\nwith inlet and outlet ports,\" Int. J. Heat Mass Transfer, vol. 49, pp.\r\n1896-1906, 2006.\r\n[18] S. L. Sinha, R. C. Arora, and S. Roy, \"Numerical Simulation of\r\nTwo-Dimensional Room Air Flow with and without Buoyancy,\" Energy\r\nand Buildings, vol. 32, pp. 121-129, 2000.\r\n[19] Z. Zhang, W. Zhang, Z. Zhai, and Q. Chen, \"Evaluation of various\r\nturbulence models in predicting airflow and turbulence in enclosed\r\nenvironments by CFD: Part-2: comparison with experimental data from\r\nliterature,\" HVAC&R Research, vol. 13, no. 6, 2007.\r\n[20] A. Stamou, and I. Katsiris, \"Verification of a CFD model for indoor\r\nairflow and heat transfer,\" Building and Environment, vol. 41, pp.\r\n1171-1181, 2006.\r\n[21] X. Shi, and J. M. Khodadadi, \"Fluid Flow and Heat Transfer in a\r\nLid-Driven Cavity Due to an Oscillating Thin Fin: Transient Behavior,\"\r\nASME J. Heat Transfer, vol. 126, pp. 924-930, 2004.\r\n[22] ANSYS FLUENT: User-s Guide, Release 14.5, ANSYS Inc., USA, 2012.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 77, 2013"}