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Journal articles on the topic 'Airflow measurements'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

De Vogeleer, Gerlinde, Peter Demeyer, Philippe Van Overbeke, and Jan G. Pieters. "Assessing Airflow Distribution in Vents of a Naturally Ventilated Test Facility Using Reference Air Velocity Measurements." Transactions of the ASABE 61, no. 3 (2018): 1065–76. http://dx.doi.org/10.13031/trans.12458.

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Abstract. Emission measurement in naturally ventilated buildings is a complex task because wind conditions can change quickly, inducing high spatial and temporal variations in the air velocity and pollutant concentration at the vent level. Simply taking the product of differential pollutant concentration and airflow rate may generate inaccurate results because the limited number of measurement locations usually fails to correctly reflect the velocity and concentration distributions in the vents. To assess the predictability of the airflow distribution in the vents of a naturally ventilated bui

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2

Marano, Giuseppe. "Airflow measurements in small animals." Laboratory Animals 28, no. 3 (July 1, 1994): 239–43. http://dx.doi.org/10.1258/002367794780681624.

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Monitoring respiratory airflow is extremely important in pharmacological studies of the respiratory system. However, in mechanically ventilated small animals (e.g. rats and guinea pigs) the use of a commercial pneumotachometer, attached directly to the tracheal cannula, substantially increases the equipment dead space (the volume shared by inspired and expired gases). Since apparatus dead space must be added to the tidal volume (determined on the basis of ventilatory rate and animal body weight) necessary to meet the respiratory needs of the animal, the resulting stroke volume is greatly incre

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Tang, Xiaoning, and Xiong Yan. "Airflow resistance of acoustical fibrous materials: Measurements, calculations and applications." Journal of Industrial Textiles 49, no. 8 (October 15, 2018): 981–1010. http://dx.doi.org/10.1177/1528083718805714.

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The acoustic performance of fibrous materials is mainly determined by its airflow resistance, and it is a parameter of the resistance that the airflow meets through the materials. This paper has summarized the recent advances on the measurements, calculations and applications of airflow resistance. Firstly, different methods for airflow resistance measurements are presented, mainly including the direct airflow method, alternating airflow method and acoustical method. We have summarized the development history, current status and industrial applications of these methods. Secondly, this paper ha

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M'zoughi, Fares, Izaskun Garrido, Aitor J. Garrido, and Manuel De La Sen. "ANN-Based Airflow Control for an Oscillating Water Column Using Surface Elevation Measurements." Sensors 20, no. 5 (February 29, 2020): 1352. http://dx.doi.org/10.3390/s20051352.

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Oscillating water column (OWC) plants face power generation limitations due to the stalling phenomenon. This behavior can be avoided by an airflow control strategy that can anticipate the incoming peak waves and reduce its airflow velocity within the turbine duct. In this sense, this work aims to use the power of artificial neural networks (ANN) to recognize the different incoming waves in order to distinguish the strong waves that provoke the stalling behavior and generate a suitable airflow speed reference for the airflow control scheme. The ANN is, therefore, trained using real surface elev

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5

Miller, Creighton J., and Raymond Daniloff. "Airflow measurements: Theory and utility of findings." Journal of Voice 7, no. 1 (March 1993): 38–46. http://dx.doi.org/10.1016/s0892-1997(05)80110-9.

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6

Blonshine, Susan, and Michael D. Goldman. "Optimizing Performance of Respiratory Airflow Resistance Measurements." Chest 134, no. 6 (December 2008): 1304–9. http://dx.doi.org/10.1378/chest.06-2898.

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7

Wodziak, Waldemar, and Jacek Sobczyk. "PIV measurements of airflow past multiple cylinders." EPJ Web of Conferences 180 (2018): 02121. http://dx.doi.org/10.1051/epjconf/201817002121.

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Wodziak, Waldemar, and Jacek Sobczyk. "PIV measurements of airflow past multiple cylinders." EPJ Web of Conferences 180 (2018): 02121. http://dx.doi.org/10.1051/epjconf/201818002121.

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Flow characteristics in vicinity of six circular cylinders aligned inline was investigated experimentally by means of PIV method. Experiments were conducted in a low speed closed circuit wind tunnel. Inflow velocity was 1.2 m/s which corresponds to Re=1600 based on the cylinder diameter. Spacing ratio between cylinders L/D was 1.5. Instantaneous and averaged velocity fields were presented. Experiments were designed in order to use their results as a test case for future numerical calculations.

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Pesic, Radivoje, Aleksandar Davinic, Snezana Petkovic, Dragan Taranovic, and Danijela Miloradovic. "Aspects of volumetric efficiency measurement for reciprocating engines." Thermal Science 17, no. 1 (2013): 35–48. http://dx.doi.org/10.2298/tsci120531153p.

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The volumetric efficiency significantly influences engine output. Both design and dimensions of an intake and exhaust system have large impact on volumetric efficiency. Experimental equipment for measuring of airflow through the engine, which is placed in the intake system, may affect the results of measurements and distort the real picture of the impact of individual structural factors. This paper deals with the problems of experimental determination of intake airflow using orifice plates and the influence of orifice plate diameter on the results of the measurements. The problems of airflow m

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10

Ferdyn-Grygierek, Joanna, Andrzej Baranowski, Monika Blaszczok, and Jan Kaczmarczyk. "Thermal Diagnostics of Natural Ventilation in Buildings: An Integrated Approach." Energies 12, no. 23 (November 29, 2019): 4556. http://dx.doi.org/10.3390/en12234556.

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Diagnostics of natural ventilation in buildings is problematic, as the airflow rate changes considerably over time. One constant average airflow is usually assumed when calculating energy demand for a building, however, such a simplification could be fraught with considerable error. The paper describes a comprehensive methodology for the diagnostics of a natural ventilation system in a building and its practical application. Based on in situ measurements and simulations in two existing buildings (dwelling house and school) in Poland, the real values of the ventilating airflows were analyzed an

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11

Eccles, R. "A guide to practical aspects of measurement of human nasal airflow by rhinomanometry." Rhinology journal 49, no. 1 (March 1, 2011): 2–10. http://dx.doi.org/10.4193/rhino10.065.

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The guide is intended for all those interested in measuring human nasal airflow by rhinomanometry, either for clinical or research purposes. The guide is written in non-technical language so that it may be understood by nursing and support staff who may need to make measurements using rhinomanometry. It is not a systematic review of the literature but a personal view based on over 40 years experience of measuring nasal airflow. The guide introduces the basic principles of nasal airflow and pressure and their measurement. The following topics are discussed: anterior and posterior rhinomanometry

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12

Ebner, P. P., S. A. Grimm, M. Schneebeli, and A. Steinfeld. "An instrumented sample holder for time-lapse microtomography measurements of snow under advective airflow." Geoscientific Instrumentation, Methods and Data Systems 3, no. 2 (September 24, 2014): 179–85. http://dx.doi.org/10.5194/gi-3-179-2014.

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Abstract. An instrumented sample holder was developed for time-lapse microtomography of snow samples to enable in situ nondestructive spatial and temporal measurements under controlled advective airflows, temperature gradients, and air humidities. The design was aided by computational fluid dynamics simulations to evaluate the airflow uniformity across the snow sample. Morphological and mass transport properties were evaluated during a 4-day test run. This instrument allows the experimental characterization of metamorphism of snow undergoing structural changes with time.

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Ebner, P. P., S. A. Grimm, M. Schneebeli, and A. Steinfeld. "An instrumented sample holder for time-lapse micro-tomography measurements of snow under advective airflow." Geoscientific Instrumentation, Methods and Data Systems Discussions 4, no. 1 (June 24, 2014): 353–73. http://dx.doi.org/10.5194/gid-4-353-2014.

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Abstract. An instrumented sample holder was developed for time-lapse micro-tomography of snow samples to enable in-situ nondestructive spatial and temporal measurements under controlled advective airflows, temperature gradients, and air humidities. The design was aided by computational fluid dynamics simulations to evaluate the airflow uniformity across the snow sample. Morphological and mass transport properties were evaluated during a 4 day test run. This instrument allows the experimental characterization of metamorphism of snow undergoing structural changes with time.

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14

Lopresti, Erika R., Arthur T. Johnson, Frank C. Koh, William H. Scott, Shaya Jamshidi, and Nischom K. Silverman. "Testing limits to airflow perturbation device (APD) measurements." BioMedical Engineering OnLine 7, no. 1 (2008): 28. http://dx.doi.org/10.1186/1475-925x-7-28.

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15

Danišovič, Peter, Juraj Šrámek, Michal Hodoň, and Martin Húdik. "Testing measurements of airflow velocity in road tunnels." MATEC Web of Conferences 117 (2017): 00035. http://dx.doi.org/10.1051/matecconf/201711700035.

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16

Weir, M. J. C. "AIRFLOW PATTERNS FROM PHOTOGRAMMETRIC MEASUREMENTS OF WINDBLOWN TIMBER." Photogrammetric Record 7, no. 42 (August 26, 2006): 731–36. http://dx.doi.org/10.1111/j.1477-9730.1973.tb01213.x.

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17

Whicker, Jeffrey J., Guy D. Baker, and Piotr T. Wasiolek. "QUANTITATIVE MEASUREMENTS OF AIRFLOW INSIDE A NUCLEAR LABORATORY." Health Physics 79, no. 6 (December 2000): 712–21. http://dx.doi.org/10.1097/00004032-200012000-00018.

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18

Panov, A. P., and A. N. Serov. "Measurements of the Airflow Velocity Using Ultrasonic Transducers." Russian Microelectronics 48, no. 7 (December 2019): 501–5. http://dx.doi.org/10.1134/s1063739719070096.

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19

Bard, Michael C., Thomas V. McCaffrey, David H. Slavit, and Richard J. Lipton. "Noninvasive Technique for Estimating Subglottic Pressure and Laryngeal Efficiency." Annals of Otology, Rhinology & Laryngology 101, no. 7 (July 1992): 578–82. http://dx.doi.org/10.1177/000348949210100706.

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The clinical assessment of aerodynamic parameters is important in the physiology and pathophysiology of laryngeal function. Vocal efficiency is among these objective measurements and can be calculated from simultaneous recordings of subglottic pressure, airflow, and sound intensity. Modern techniques allow us to accurately determine sound intensity and airflow. However, methods to determine subglottic pressure are either invasive or laborious. We have evaluated a noninvasive, indirect method to determine subglottic pressure by using a technique based on the interruption of transglottic airflow

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20

Bolberg, Mads. "How small-scale variation in mineral wool products effect random incidence sound absorption." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 4 (August 1, 2021): 2313–17. http://dx.doi.org/10.3397/in-2021-2103.

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Mineral wool products are produced by creating a spray of fibres, that is collected and made into slabs. This randomized spray can lead to small variations across a slab. Nevertheless, mineral wool slabs are often treated in acoustics as locally reacting perfectly homogeneous, isotropic materials. This means that small-scale characterisations are extrapolated to large-scale without considering the impact from possible variations in a large-scale setup. The question is how the small-scale characterisations should be used for large-scale setups with this in mind. Three products with the same thi

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21

Garman, K. E., K. A. Hill, P. Wyss, M. Carlsen, J. R. Zimmerman, B. H. Stirm, T. Q. Carney, R. Santini, and P. B. Shepson. "An Airborne and Wind Tunnel Evaluation of a Wind Turbulence Measurement System for Aircraft-Based Flux Measurements*." Journal of Atmospheric and Oceanic Technology 23, no. 12 (December 1, 2006): 1696–708. http://dx.doi.org/10.1175/jtech1940.1.

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Abstract Although the ability to measure vertical eddy fluxes of gases from aircraft platforms represents an important capability to obtain spatially resolved data, accurate and reliable determination of the turbulent vertical velocity presents a great challenge. A nine-hole hemispherical probe known as the “Best Air Turbulence Probe” (often abbreviated as the “BAT Probe”) is frequently used in aircraft-based flux studies to sense the airflow angles and velocity relative to the aircraft. Instruments such as inertial navigation and global positioning systems allow the measured airflow to be con

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22

Hernandez Bennetts, Victor, Kamarulzaman Kamarudin, Thomas Wiedemann, Tomasz Kucner, Sai Somisetty, and Achim Lilienthal. "Multi-Domain Airflow Modeling and Ventilation Characterization Using Mobile Robots, Stationary Sensors and Machine Learning." Sensors 19, no. 5 (March 5, 2019): 1119. http://dx.doi.org/10.3390/s19051119.

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Ventilation systems are critically important components of many public buildings and workspaces. Proper ventilation is often crucial for preventing accidents, such as explosions in mines and avoiding health issues, for example, through long-term exposure to harmful respirable matter. Validation and maintenance of ventilation systems is thus of key interest for plant operators and authorities. However, methods for ventilation characterization, which allow us to monitor whether the ventilation system in place works as desired, hardly exist. This article addresses the critical challenge of ventil

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23

Cowie, Robert L., Margot F. Underwood, and Stephen K. Field. "Asthma Symptoms Do not Predict Spirometry." Canadian Respiratory Journal 14, no. 6 (2007): 339–42. http://dx.doi.org/10.1155/2007/816132.

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BACKGROUND: Asthma is a disease characterized by variable airflow obstruction, but the measurement of airflow is often omitted in the process of diagnosis and management of the disease.OBJECTIVES: Features of asthma severity and control were examined to determine the extent to which objective measurements, including forced expiratory volume in 1 s and forced expiratory volume in 1 s/forced vital capacity, correlated with other manifestations of the disease.METHODS: Subjects were a consecutive sample of patients with asthma attending a university-based asthma clinic. All subjects underwent rout

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24

Scaar, H., U. Praeger, M. Spuhler, D. A. Neuwald, I. Truppel, M. Linke, K. Gottschalk, M. König, J. N. Wünsche, and M. Geyer. "Wind tunnel airflow measurements on plastic apple storage bins." Acta Horticulturae, no. 1194 (March 2018): 1321–28. http://dx.doi.org/10.17660/actahortic.2018.1194.186.

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25

Kisilewicz, T., and K. Nowak-Dzieszko. "Low airflow measurements by means of gas tracing method." IOP Conference Series: Materials Science and Engineering 415 (November 1, 2018): 012030. http://dx.doi.org/10.1088/1757-899x/415/1/012030.

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26

Jiang, Jack, Timothy O'Mara, David Conley, and David Hanson. "Phonation threshold pressure measurements during phonation by airflow interruption." Laryngoscope 109, no. 3 (March 1999): 425–32. http://dx.doi.org/10.1097/00005537-199903000-00016.

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27

Fishwick, D., R. Barraclough, T. Pickering, A. Fletcher, R. Lewis, R. Niven, and C. J. Warburton. "Comparison of various airflow measurements in symptomatic textile workers." Occupational Medicine 60, no. 8 (September 15, 2010): 631–34. http://dx.doi.org/10.1093/occmed/kqq135.

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28

Pedersen, T. F. "On wind turbine power performance measurements at inclined airflow." Wind Energy 7, no. 3 (July 2004): 163–76. http://dx.doi.org/10.1002/we.112.

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29

Cui, Can, Wenjian Cai, and Haoran Chen. "Airflow measurements using averaging Pitot tube under restricted conditions." Building and Environment 139 (July 2018): 17–26. http://dx.doi.org/10.1016/j.buildenv.2018.05.014.

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30

Eftekhari, M. M., and D. J. Pinnock. "Natural ventilation: Airflow measurements in a lightweight test room." Building Services Engineering Research and Technology 19, no. 1 (February 1998): 37–42. http://dx.doi.org/10.1177/014362449801900107.

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31

Pogosov, G. A., and N. Sh Khaikin. "Doppler measurements of relative airflow velocities using CO2 lasers." Measurement Techniques 36, no. 11 (November 1993): 1247–50. http://dx.doi.org/10.1007/bf00978175.

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32

Vernay, Didier G., Benny Raphael, and Ian F. C. Smith. "Augmenting simulations of airflow around buildings using field measurements." Advanced Engineering Informatics 28, no. 4 (October 2014): 412–24. http://dx.doi.org/10.1016/j.aei.2014.06.003.

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33

Cheong, K. W. "Tracer gas technology for airflow measurements in HVAC systems." International Journal of Energy Research 20, no. 12 (December 1996): 1081–93. http://dx.doi.org/10.1002/(sici)1099-114x(199612)20:12<1081::aid-er236>3.0.co;2-o.

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34

Tamura, Kaori, Sayaka Matsumoto, Yu Hsuan Tseng, Takayuki Kobayashi, Jun’ichi Miwa, Ken’ichi Miyazawa, Toyotaka Hirao, et al. "Physiological and subjective comfort evaluation under different airflow directions in a cooling environment." PLOS ONE 16, no. 4 (April 14, 2021): e0249235. http://dx.doi.org/10.1371/journal.pone.0249235.

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Indoor comfort is influenced by airflow direction, but subjective evaluations can differ. This study evaluates the airflow comfort with subjective assessments and physiological measurements, including skin temperature, electroencephalograms, and electrocardiograms. Nineteen participants entered a test room at 20°C after staying in a room at 32°C for acclimation. They were exposed to indirect and direct airflow conditions to their faces and performed four tasks under each condition: resting, counting to 10 s following time alerts, counting to 10 s in mind, and mental calculation. Subjective ass

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35

Rodríguez Vercher, Juan Carlos, Romina del Rey, and Jesús Alba. "Indirect determination of airflow resistance of textiles with reference samples." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 3 (August 1, 2021): 3708–13. http://dx.doi.org/10.3397/in-2021-2495.

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Airflow resistance is a non-acoustic parameter of great relevance in the acoustic characterization of porous materials. It is used in several sound absorbing material prediction models and it is also a control parameter for acoustic conditioning and insulation in different building solutions. The ISO 9053 standard defines several methods to obtain it, using both direct measurements and indirect techniques. However, both procedures may involve problems related to the placement of the textile samples in the tube or to the stability of the samples during testing. In this work, the use of referenc

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36

Hoff, Steven J., Dwaine S. Bundy, Minda A. Nelson, Brian C. Zelle, Larry D. Jacobson, Albert J. Heber, Jiqin Ni, Yuanhui Zhang, Jacek A. Koziel, and David B. Beasley. "Real-Time Airflow Rate Measurements from Mechanically Ventilated Animal Buildings." Journal of the Air & Waste Management Association 59, no. 6 (June 2009): 683–94. http://dx.doi.org/10.3155/1047-3289.59.6.683.

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37

E. Franz, L. F. Bouse, and J. C. Brusse. "System for In-flight Airflow Measurements of an Agricultural Aircraft." Transactions of the ASAE 39, no. 6 (1996): 1961–69. http://dx.doi.org/10.13031/2013.27697.

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L. F. Bouse, E. Franz, and J. C. Brusse. "In-flight Airflow Measurements of a Cessna AgHusky Agricultural Aircraft." Transactions of the ASAE 39, no. 6 (1996): 1971–76. http://dx.doi.org/10.13031/2013.27698.

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39

Kook Kim, Jin, Joo-Heon Yoon, Chang Hoon Kim, Tae Wook Nam, Dae Bo Shim, and Hyang Ae Shin. "Particle image velocimetry measurements for the study of nasal airflow." Acta Oto-Laryngologica 126, no. 3 (January 2006): 282–87. http://dx.doi.org/10.1080/00016480500361320.

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40

Allil, Alexandre Silva, Fábio da S. Dutra, Marcelo Martins Werneck, Regina Célia da Silva Barros Allil, and Cesar Cosenza De Carvalho. "Optoelectronic sensor applied to airflow velocity measurements on flare systems." Rio Oil and Gas Expo and Conference 20, no. 2020 (December 1, 2020): 226–27. http://dx.doi.org/10.48072/2525-7579.rog.2020.226.

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41

Ceylan, Seyit M., Mahmut A. Kanmaz, Ilyas Disikirik, and Pinar G. Karadeniz. "Peak nasal inspiratory airflow measurements for assessing laryngopharyngeal reflux treatment." Clinical Otolaryngology 46, no. 4 (February 21, 2021): 796–801. http://dx.doi.org/10.1111/coa.13737.

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42

NI, J. Q., A. J. HEBER, T. T. LIM, C. A. DIEHL, R. K. DUGGIRALA, and B. L. HAYMORE. "Hydrogen sulphide emission from two large pig-finishing buildings with long-term high-frequency measurements." Journal of Agricultural Science 138, no. 2 (March 2002): 227–36. http://dx.doi.org/10.1017/s0021859601001824.

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Hydrogen sulphide (H2S) is a common toxic air pollutant and is emitted from decomposing manure at animal facilities. However, there have been only a few studies of H2S emissions from animal buildings, especially those involving long-term, high-frequency measurements. In the current study, H2S emissions from two, 1000-head pig-finishing buildings in Illinois, USA, were monitored with a high-frequency measurement system for 6 months in 1997 during two, partial, pig-growth cycles. Air sample streams were continuously taken from the pit headspace, and the pit and wall fan exhaust air. Hydrogen sul

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Smith, Bonnie E., Thomas W. Guyette, Yash Patil, and Timothy S. Brannan. "Pressure-Flow Measurements for Selected Nasal Sound Segments Produced by Normal Children and Adolescents." Cleft Palate-Craniofacial Journal 40, no. 2 (March 2003): 158–64. http://dx.doi.org/10.1597/1545-1569_2003_040_0158_pfmfsn_2.0.co_2.

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Objective The purpose of this prospective study was to: (1) report simultaneous oral-nasal pressures, nasal airflow rates, and velopharyngeal orifice areas for nasal sounds produced by children and adolescents; (2) determine whether data could be statistically classified by age, sex, or utterance type; and (3) provide guidelines for determining typical from atypical productions. Participants The study involved 56 subjects, with two boys and two girls representing each age from 5 to 18 years. Subjects had no history of speech therapy, were judged as having normal speech and resonance at the tim

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Romano, Francesco, Samanta Milani, Roberto Ricci, and Cesare Maria Joppolo. "Operating Theatre Ventilation Systems and Their Performance in Contamination Control: “At Rest” and “In Operation” Particle and Microbial Measurements Made in an Italian Large and Multi-Year Inspection Campaign." International Journal of Environmental Research and Public Health 17, no. 19 (October 5, 2020): 7275. http://dx.doi.org/10.3390/ijerph17197275.

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In Operating Theatres (OT), the ventilation system plays an important role in controlling airborne contamination and reducing the risks of Surgical Site Infections (SSIs). The air cleanliness is really crucial in this field and different measurements are used in order to characterize the situation in terms of both airborne microbiological pollutants and particle size and concentration. Although the ventilation systems and airborne contamination are strictly linked, different air diffusion schemes (in particular, the Partial Unidirectional Airflow, P-UDAF, and the Mixing Airflow, MAF) and vario

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Chinchella, Enrico, Arianna Cauteruccio, Mattia Stagnaro, and Luca G. Lanza. "Investigation of the Wind-Induced Airflow Pattern Near the Thies LPM Precipitation Gauge." Sensors 21, no. 14 (July 17, 2021): 4880. http://dx.doi.org/10.3390/s21144880.

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The airflow velocity pattern generated by a widely used non-catching precipitation gauge (the Thies laser precipitation monitor or LPM) when immersed in a wind field is investigated using computational fluid dynamics (CFD). The simulation numerically solves the unsteady Reynolds-averaged Navier–Stokes (URANS) equations and the setup is validated against dedicated wind tunnel measurements. The adopted k-ω shear stress transport (SST) turbulence model closely reproduces the flow pattern generated by the complex, non-axisymmetric outer geometry of the instrument. The airflow pattern near the meas

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46

Gendelis, S., and A. Jakovičs. "Numerical Modelling of Airflow and Temperature Distribution in a Living Room with Different Heat Exchange Conditions." Latvian Journal of Physics and Technical Sciences 47, no. 4 (January 1, 2010): 27–43. http://dx.doi.org/10.2478/v10047-010-0016-z.

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Numerical Modelling of Airflow and Temperature Distribution in a Living Room with Different Heat Exchange ConditionsNumerical mathematical modelling of the indoor thermal conditions and of the energy losses for separate rooms is an important part of the analysis of the heat-exchange balance and energy efficiency in buildings. The measurements of heat transfer coefficients for bounding structures, the air-tightness tests and thermographic diagnostics done for a building allow the influence of those factors to be predicted more correctly in developed numerical models. The temperature distributio

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47

Markov, Detelin, Nikolay Ivanov, George Pichurov, Marina Zasimova, Peter Stankov, Evgueni Smirnov, Iskra Simova, Vladimir Ris, Radostina A. Angelova, and Rositsa Velichkova. "On the Procedure of Draught Rate Assessment in Indoor Spaces." Applied Sciences 10, no. 15 (July 22, 2020): 5036. http://dx.doi.org/10.3390/app10155036.

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The objective of the paper is to demonstrate the importance of the unsteady Computational Fluid Dynamics (CFD) simulations and long-term measurements for the reliable assessment of thermal comfort indoors, for proper categorization of the indoor thermal environment and for identifying the reasons for complaints due to draught discomfort. Numerical simulations and experimental measurements were applied in combination to study ventilation in a field laboratory, a university classroom with a controlled indoor environment. Strong unsteadiness of the airflow was registered both in the unsteady RANS

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48

Verneuil, Andrew, Bruce R. Gerratt, David A. Berry, Ming Ye, Jody Kreiman, and Gerald S. Berke. "Modeling Measured Glottal Volume Velocity Waveforms." Annals of Otology, Rhinology & Laryngology 112, no. 2 (February 2003): 120–31. http://dx.doi.org/10.1177/000348940311200204.

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The source-filter theory of speech production describes a glottal energy source (volume velocity waveform) that is filtered by the vocal tract and radiates from the mouth as phonation. The characteristics of the volume velocity waveform, the source that drives phonation, have been estimated, but never directly measured at the glottis. To accomplish this measurement, constant temperature anemometer probes were used in an in vivo canine constant pressure model of phonation. A 3-probe array was positioned supraglottically, and an endoscopic camera was positioned subglottically. Simultaneous recor

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Xu, Zhanyang, Wenhe Liu, Tieliang Wang, Wei Yu, and Yuqing Zhang. "Simulation of Airflow in the Burning Cave of an Auxiliary Heating System in a Greenhouse." Transactions of the ASABE 61, no. 4 (2018): 1405–16. http://dx.doi.org/10.13031/trans.12719.

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Abstract. In this study, numerical simulations of airflow were carried out in the burning cave of an auxiliary heating system. Experimental measurements were also conducted to verify the performance of the numerical model, and turbulent airflow in the burning cave was considered. The numerical simulation in the burning cave was performed for three cases:(1) with a baffle at the bottom of the burning cave entrance, (2) without a baffle at the burning cave entrance, and (3) with a baffle at the top of the burning cave entrance. The turbulent airflow was modeled using the realizable k-e turbulenc

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Wang, Fujen, Yishun Huang, and BowoYuli Prasetyo. "Energy-Efficient Improvement Approaches through Numerical Simulation and Field Measurement for a Data Center." Energies 12, no. 14 (July 18, 2019): 2757. http://dx.doi.org/10.3390/en12142757.

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The power density of electronic equipment increased dramatically recently. Data center and data processing and telecommunication facilities are facing the exceptionally high sensible heat loads which result in a large amount of energy consumption. In this study, a numerical simulation using computational fluid dynamics (CFD) was conducted to investigate the influence of alternative approaches to avoid bypassing and recirculation for air distribution in a full-scale data center. Field measurements were extensively conducted to validate the simulation results. Various performance indexes were ad

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