Numerical modeling of a complex diffuser in a room with displacement ventilation

Building and Environment

Volumn 45, Issue 10, 2010, Pages 2240-2252

  Cehlin, M ^a   Moshfegh, B ^a,b  

^a UNIVERSITY OF GÄVLE   (Sweden)

^b LINKÖPING UNIVERSITY   (Sweden)

Author keywords

Displacement ventilation; Inlet supply; Numerical simulation; Reynolds stress model

Indexed keywords

DISPLACEMENT VENTILATION; INDOOR AIR; INDOOR AIR FLOW; INDOOR AIR QUALITY; LOW-VELOCITY; NUMERICAL MODELING; NUMERICAL PREDICTIONS; NUMERICAL SIMULATION; REYNOLDS STRESS MODELS; THERMAL BEHAVIORS;

AIR CONDITIONING; AIR QUALITY; COMPUTER SIMULATION; CYCLONE SEPARATORS; FORECASTING; INDOOR AIR POLLUTION; REYNOLDS NUMBER; VENTILATION;

MATHEMATICAL MODELS;

AIR CONDITIONING; AIR QUALITY; DIFFUSION; INDOOR AIR; NUMERICAL MODEL; VENTILATION;

EID: 77953541457     PISSN: 03601323     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.buildenv.2010.04.008     Document Type: Article

References (41)

1. Cehlin M., Moshfegh B., Sandberg M. Measurements of air temperatures close to a low-velocity diffuser in displacement ventilation using infrared camera. Energy and Buildings 2002, 34:687-698.
2. Cehlin M, Sandberg, M. " Monitoring of a low-velocity air jet using computed tomography" In: Proceedings of the eight international conference on air distribution in rooms; 2002. p. 361-4.
3. Hassani V., Stetz M. Application of infrared thermography to room air temperature measurements. Proceedings ASHRAE Transactions 1994, (Part 2):1238-1247.
4. Linden E, Todde V, Sandberg, M. " Indoor Low Speed Air Jet Flow: 3-dimensional Particle Streak Velocimetry" In: Proceedings of the sixth international conference on air distribution in rooms, vol. 2; 1998. p. 569-76.
5. Müller D, Renz U. " A low cost particle streak tracking system (PST) and a new approach to three dimensional airflow velocity measurements" Roomvent'98, vol. 2; 1998. p. 593-600.
6. Price P., Fischer M., Gadgil A., Sextro R. Algorithm for rapid gas concentration tomography 2000, Lawrence Berkeley National Laboratory, LBNL Report 46236.
7. Todd L., Farhat S., Mottus K., Mihlan G. Experimental evaluation of an environmental CAT scanning system for mapping chemicals in air in real-time. Applied Occupational and Environmental Hygiene 2001, 16(1):45-55.
8. Sun Y., Zhang Y. An overview of room air motion measurement: technology and application. HVAC&R Research 2007, 13(6):929-950.
9. Sandberg M. Whole-field measuring methods in ventilated rooms. HVAC&R Research 2007, 13(6):951-970.
10. Mathisen H.M. " Case studies of displacement ventilation in public Halls" ASHRAE Transactions 1989, 95:1018-1027.
11. Palonen J., Majanen A., Seppänen O. Performance of displacement air distribution in an office room. Environmental International 1991, 17:303-309.
12. Etheridge D., Sandberg M. Building ventilation, theory and measurement 1996, John Wiley and Sons Ltd., England.
13. Wyon D., Sandberg M. Thermal Manikin prediction of discomfort due to displacement ventilation. ASHRAE Transactions 1989, 95(part 1).
14. Fanger P.O., Melikov A.K., Hanzawa H., Ring J. Air turbulence and sensation of draught. Energy and Buildings 1988, 12:21-39.
15. Fanger PO, Pedersen CJK. " Discomfort Due to Air Velocities in Spaces" In: Proceedings of the Meeting of Commission B1, B2, E1 of the International Institute of Refrigeration, vol. 4; 1977. p. 289-96.
16. Peng S, Davidson, L. " The Potential of large eddy simulation techniques for modeling indoor air flows" In: Proceedings RoomVent, vol. 1; 2000. p. 295-300.
17. Chen Q. Computational fluid dynamics for HVAC: successes and failures. ASHRAE Transactions 1997, 103(Part 1):178-187.
18. Zhang Z., Zhang W., Zhai Z., Chen Q. Evaluation of various turbulence models in predicting airflow and turbulence in enclosed environments by CFD: Part-2: comparison with experimental data from literature. HVAC&R Research 2007, 13(6):871-886.
19. Baker A., Kelso R., Gordon E., Roy S., Schaub E. Computational Fluid Dynamics: a two-edged sword. ASHRAE Journal August 1997, 51-58.
20. Loomans M. " The Measurement and Simulation of Indoor Air Flow" Ph. D thesis, ISBN 90 6814 085 X, Eindhoven University of Technology, Eindhoven, The Netherlands; 1998.
21. Cheesewright R, King KL, Ziai. S. " Experimental data for the validation of computer codes for the prediction of two-dimensional buoyant cavity flows" In: Proceedings of ASME Winter Annual Meeting, Anaheim, HTD-60; 1986. p. 75-81.
22. Nielsen P.V. Specification of a two-dimensional test case 1990, Aalborg University, ISSN 0902-7513 R9040.
23. Emvin P, Davidson L. " A numerical comparison of three inlet approximation of the diffuser in case E1 Annex 20" In: Proceedings Roomvent'96, vol. 1. Yokohama, Japan; 1996. p. 219-26.
24. Chen, Q, Moser, A. " Simulation of a Multi-nozzle Diffuser" In: Proceedings of the 12th AIVC Conference, vol. 2, Ottawa; 1991. p. 1-13.
25. Heikkinen J. " Modelling of a supply air terminal for room air flow simulation" In: Proceedings of the 12th AIVC Conf., Ottawa, Canada; 1991.
26. Nielsen P.V. The box method - A practical procedure for introduction of an air terminal device in CFD Calculation 1997, Aalborg Universitet, Denmark, ISSN 1395-7953 R9744.
27. Nielsen P.V. The prescribed velocity method - A practical procedure for introduction of an air terminal device in CFD Calculation 1998, Aalborg Universitet, Denmark, ISSN 1395-7953 R9827.
28. Kondo Y, Nagasawa Y. " Modeling of Complex Air Diffuser for CFD Simulation: Part 1" In: Eight international conference on Air distribution in rooms; 2002. p. 105-8.
29. Kondo Y, Nagasawa Y. " Modeling of complex air diffuser for CFD simulation: part 2" In: Eight international conference on air distribution in rooms. 2002. p. 109-12.
30. Huo Y., Haghigha F., Zhang J.S., Shaw C.Y. A systematic approach to describe the air Terminal device in CFD simulation for room air distribution analysis. Building and Environment 2000, 35:563-576.
31. Djunaedy E., Cheong K.W.D. Development of a simplified technique of modelling four-way Ceiling air supply diffuser. Building and Environment 2002, 37:393-403.
32. Zhang T., Lee K., Chen Q. A simplified approach to describe complex diffusers in displacement ventilation for CFD simulations. Indoor Air 2009, 19:255-267.
33. Cehlin M, Moshfegh B. " Numerical and experimental investigations of air flow and temperature patterns of a low velocity diffuser" In: Proceedings of the ninth international conference on indoor air quality and climate" vol. 3; 2002. p. 765-70.
34. Cehlin M, Moshfegh B, Sandberg M. " Visualization and measuring of air temperatures based on infrared thermography" In: Proceedings of the seventh international conference on air distribution in rooms, vol. 1; 2000 p. 350-8.
35. Launder B.E., Reece G.J., Rodi W. Progress in the development of a Reynolds-stress turbulence closure. Journal Fluid Mechanics 1975, 68(3):537-566.
36. Fluent Manual Fluent 6 2001, FLUENT Inc.
37. Jorgensen F.E. How to measure turbulence with hot-wire anemometers - a Practical guide 2002, Publication nr. 9040U6151, Dantec Dynamics, Denmark.
38. Bruun H.H. Hot-wire anemometry, principles and signal analysis 1995, Oxford University Press Inc., New York.
39. Turner J. Buoyancy effects in fluids 1979, Cambridge University Press, Cambridge.
40. Nielsen P.V. Stratified flow in a room with displacement ventilation and wall-mounted air Terminal devices. Transactions of the American Society of Heating Refrigeration and Air Conditioning 1994, 100(1):1163-1169.
41. Yuan X., Chen Q., Glicksman L.R., Hu Y., Yang X. Measurements and computations of room airflow with displacement ventilation. ASHRAE Transactions 1999, 105(1):340-352.