Wind-induced cross ventilation is one of the key technologies for saving energy while controlling the indoor environment, and seems to be a crucial element of any sustainable building policy. However, it is sometimes difficult to arrange openings on two sides for cross ventilation of a room.
Most rooms have an only single-sided opening in buildings in built-up areas. Since the airflow rate with a single-sided opening is much lower than that with two-sided openings, it is important to study how we can increase the airflow rate with a single-sided opening using either passive or active techniques. In this study, the characteristics of wind-induced ventilation with single-sided openings are analyzed through wind tunnel experiments.
In some experimental cases, a small object is attached to the opening in order to increase the airflow rate. (It is assumed that this object replicates a pivoted window whose vertical axis is in the center of the window.) In other experimental cases, circulation flow is artificially induced in the room used in the experimental model in order to increase the airflow rate. A synergistic effect from the fresh air entering through the opening is expected with the circulation.
Educational Record:
University of Tokyo, Department of Engineering, Environmental Control, 1980, Doctor of Eng.
University of Tokyo, Department of Engineering, Faculty of Architecture, 1975, Bachelor of Eng.
Professional Experience:
1999 Professor, I.I.S., University of Tokyo
1987 Associate Professor, I.I.S., University of Tokyo
1980 Research Associate, Dept. of Architecture Faculty of Eng., University of Tokyo
Principal Technical Interest Areas:
1. Study on airflow and temperature distributions in room
2. Study on smoke and fire control in room
3. Study on human sensation for indoor environment
4. Room air distribution, control of fire and smoke, health and safety
Honors:
1997 CROSBY FIELD AWARD, ASHRAE, 1998
AIJ award, AIJ, 1997
AIJ award, AIJ, 1990
SHASEJ best paper award, SHASEJ, 1988- 2002 total 10
Technical Papers:
Kato, S., Ito, S. and Murakami, S. (2003) Analysis of visitation frequency through particle tracking method
based on LES and model experiment., Indoor Air 2003: 13, pp. 182-193.
Murakami, S., Kato, S. and Zeng, J. (2000) Combined Simulation of Airflow, Radiation and Moisture Transport
for Heat Release from A Human Body., Building and Environment., Vol. 35, No. 6, pp. 498- 500.
Shiraishi, Y., Kato, S., Murakami, S., Kim, S. and Ooka, R. (1999) Numerical analysis of thermal plume
caused by large-scale fire in urban area., Journal of Wind Engineering and Industrial Aerodynamics Vol. 81., pp. 261-271.
Murakami, S., Kato, S. and Zeng, J. (1997) Flow and Temperature Fields Around Human Body with Various Room
Air Distribution - CRD Study on Computational Thermal Manikin: Part 1., ASHRAE Transactions 1997, V. 103, Pt. 1., 12 pp.
Murakami, S., Kato, S., Chikamoto, T., Laurence, D. and Blay, D. (1996) New low-Reynolds-number k-e model
including damping effect due to buoyancy in a stratified flow field., Int. J. Heat Mass Transfer, Vol. 39, No. 16., pp. 3483-3496.
Murakami, S., Kato, S., Deguchi, K., Takahashi, T., Makimura, I. and Kondo, Y. (1995) Natural Ventilation of a Large-Scale
Wholesale Market Building., ASHRAE TRANSACTIONS 1995, V. 101, Pt. 1., 11pp.
Kato, S., Murakami, S., Utsumi, Y. and Mizutani, K. (1993) Application of Massive Parallel Computer to
Computational Wind Engineering., Journal of Wind Engineering and Industrial Aerodynamics, 46&47, pp. 393-400.
Murakami, S., Kato, S., Akabayashi, S., Mizutani, K. and Kim, Y.D. (1991) Wind tunnel test on velocity-pressure field
of cross-ventilation with open windows., ASHRAE Transaction.
Kato, S. and Murakami, S. (1988) New ventilation efficiency scales based on spatial distribution of
contaminant concentration aided by numerical simulation., ASHRAE Transactions, Vol. 94, No. 2.
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