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Relevant bibliographies by topics / Turbulent airflow

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Academic literature on the topic 'Turbulent airflow'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Journal articles on the topic "Turbulent airflow"

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Broumand, M., M. Birouk, and S. Vahid Mahmoodi J. "Liquid jet primary breakup in a turbulent cross-airflow at low Weber number." Journal of Fluid Mechanics 879 (October 1, 2019): 775–92. http://dx.doi.org/10.1017/jfm.2019.704.

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The influence of turbulence characteristics of a cross-airflow including its velocity fluctuations and integral length and time scales on the primary breakup regime, trajectory and breakup height and time of a transversely injected liquid jet was investigated experimentally. Turbulence intensity of the incoming airflow was varied from $u_{rms}/u_{g}=1.5\,\%$ to 5.5 % (where $u_{g}$ is cross-airflow streamwise mean velocity and $u_{rms}$ is the r.m.s. of the corresponding cross-airflow streamwise mean velocity fluctuation) by placing at the inlet of the test section a perforated plate/grid with

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Yang, Ying, and Yongchun Zeng. "Measurement and Comparison of Melt-Blowing Airflow Fields: Nozzle Modifications to Reduce Turbulence and Fibre Whipping." Polymers 13, no. 5 (2021): 719. http://dx.doi.org/10.3390/polym13050719.

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In the melt-blowing process, micro/nanofibrous nonwovens are attenuated and formed through aerodynamic force in a turbulent airflow field. In this work, two types of airflow-directors were added under a common melt-blowing slot-die nozzle to obtain modified airflow fields. The effect of airflow-directors on time-averaged characteristics, turbulence intensity, and temperature fluctuation intensity are achieved through the simultaneous measurement of fluctuating velocity and fluctuating temperature using a two-wire probe hot-wire anemometer. Moreover, the influence of airflow-directors on fibre

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Xie, Sheng, Guojun Jiang, Baolin Ye, and Baoqing Shentu. "Particle Image Velocimetry (PIV) Investigation of the Turbulent Airflow in Slot-Die Melt Blowing." Polymers 12, no. 2 (2020): 279. http://dx.doi.org/10.3390/polym12020279.

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In order to explore the forming mechanism of the fiber whipping motion in slot-die melt blowing, the turbulent airflow in slot-die melt blowing was measured online with the approach of the Particle Image Velocimetry (PIV) technique. The PIV results visualized the structure of the turbulent airflow and provided the distributions of air velocity components (vx, vy, and vz). Moreover, the PIV results also demonstrated the evolutive process of turbulent airflow at successive time instants. By comparing the characteristics of the turbulent airflow with the fiber whipping path, the PIV results provi

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Husain, Nyla T., Tetsu Hara, Marc P. Buckley, Kianoosh Yousefi, Fabrice Veron, and Peter P. Sullivan. "Boundary Layer Turbulence over Surface Waves in a Strongly Forced Condition: LES and Observation." Journal of Physical Oceanography 49, no. 8 (2019): 1997–2015. http://dx.doi.org/10.1175/jpo-d-19-0070.1.

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AbstractThe impact of sea state on air–sea momentum flux (or wind stress) is a poorly understood component of wind–wave interactions, particularly in high wind conditions. The wind stress and mean wind profile over the ocean are influenced by the characteristics of boundary layer turbulence over surface waves, which are strongly modulated by transient airflow separation events; however, the features controlling their occurrence and intensity are not well known. A large-eddy simulation (LES) for wind over a sinusoidal wave train is employed to reproduce laboratory observations of phase-averaged

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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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Buckley, Marc P., and Fabrice Veron. "Structure of the Airflow above Surface Waves." Journal of Physical Oceanography 46, no. 5 (2016): 1377–97. http://dx.doi.org/10.1175/jpo-d-15-0135.1.

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AbstractIn recent years, much progress has been made to quantify the momentum exchange between the atmosphere and the oceans. The role of surface waves on the airflow dynamics is known to be significant, but our physical understanding remains incomplete. The authors present detailed airflow measurements taken in the laboratory for 17 different wind wave conditions with wave ages [determined by the ratio of the speed of the peak waves Cp to the air friction velocity u* (Cp/u*)] ranging from 1.4 to 66.7. For these experiments, a combined particle image velocimetry (PIV) and laser-induced fluores

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WEXLER, D., N. BAILIE, J. KIMBELL, G. GALLAGHER, and J. WATTERSON. "Nasal Airflow: Laminar and Turbulent Characteristics." Otolaryngology - Head and Neck Surgery 133, no. 2 (2005): P102—P103. http://dx.doi.org/10.1016/j.otohns.2005.05.217.

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Alsved, M., A. Civilis, P. Ekolind, et al. "Temperature-controlled airflow ventilation in operating rooms compared with laminar airflow and turbulent mixed airflow." Journal of Hospital Infection 98, no. 2 (2018): 181–90. http://dx.doi.org/10.1016/j.jhin.2017.10.013.

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Muscă, Gelu, George Mădălin Chitaru, Costin Ioan Coşoiu, and Cătalin Nae. "Numerical simulation of the flow into a circular pipe section." E3S Web of Conferences 85 (2019): 02005. http://dx.doi.org/10.1051/e3sconf/20198502005.

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Computational Fluid dynamics (CFD) is the science that evolves rapidly in numerical solving of fluid motion equations to produce quantitative results and analyses of phenomena encountered in the fluid flow. When properly used, CFD is often ideal for parameterization studies or physical significance investigations of flow that would otherwise be impossible to replicate through theoretical or experimental tests. The aim of this paper is the study of the turbulent airflow and how the vortices formed in turbulent airflow are influenced by the evolution of the hydraulic characteristics of the fluid

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Faust, Matthias, Ralf Wolke, Steffen Münch, Roger Funk, and Kerstin Schepanski. "A new Lagrangian in-time particle simulation module (Itpas v1) for atmospheric particle dispersion." Geoscientific Model Development 14, no. 4 (2021): 2205–20. http://dx.doi.org/10.5194/gmd-14-2205-2021.

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Abstract. Trajectory models are intuitive tools for airflow studies. But in general, they are limited to non-turbulent, i.e. laminar flow, conditions. Therefore, trajectory models are not particularly suitable for investigating airflow within the turbulent atmospheric boundary layer. To overcome this, a common approach is handling the turbulent uncertainty as a random deviation from a mean path in order to create a statistic of possible solutions which envelops the mean path. This is well known as the Lagrangian particle dispersion model (LPDM). However, the decisive factor is the representati

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Dissertations / Theses on the topic "Turbulent airflow"

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Huang, Xianmin. "Volume average technique for turbulent flow simulation and its application to room airflow prediction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ27413.pdf.

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Khosrow, Ebrahimi. "Numerical simulation of turbulent airflow, tracer gas diffusion, and particle dispersion in a mockup aircraft cabin." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/13609.

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Doctor of Philosophy<br>Department of Mechanical and Nuclear Engineering<br>M.H. Hosni<br>Z.C. Zheng<br>In order to study the capability of computational methods in investigating the mechanisms associated with disease and contaminants transmission in aircraft cabins, the Computational Fluid Dynamics (CFD) models are used for the simulation of turbulent airflow, tracer gas diffusion, and particle dispersion in a generic aircraft cabin mockup. The CFD models are validated through comparisons of the CFD predictions with the corresponding experimental measurements. It is found that using Large Ed

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Rojatkar, Prachi. "Numerical Simulation of 3-D Turbulent Room Airflow Pattern and Temperature Field in UC Solar Decathlon House." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1196019483.

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Xu, Weiran 1968. "New turbulence models for indoor airflow simulation." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9933.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Architecture, 1998.<br>Includes bibliographical references (p. 157-165).<br>It is important to predict indoor environment in order to design thermally comfortable and healthy indoor spaces. Heating, Ventilating and Air Conditioning (HVAC) design engineers and architects widely use the Computational Fluid Dynamics (CFD) technique for indoor environment predictions. The CFD technique requires a turbulence model to correctly calculate indoor air distribution. However, the currently available turbulence models in the literature are e

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Lê, Tuan Thành. "Lung function by plethysmography : a new method in Vietnam for asthma diagnosis." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0341/document.

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La fréquence de l’asthme augmente au Vietnam, mais les moyens de diagnostic et d’évaluation fonctionnelle sont limités. Une étude précédente utilisant la technique des oscillations forcées a montré une différence de résistance des voies aériennes entre enfants français et vietnamiens à l’âge de 10 ans mais pas à 6 ans. Si l’hypothèse d’une différence ethnique significative est correcte, alors des différences semblables devraient aussi exister à l’âge adulte. Pour tester l’hypothèse, une étude par pléthysmographie a été mise en place pour mesurer la résistance des voies aériennes et la résistan

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Shehadi, Maher. "Airflow distribution and turbulence analysis in the longitudinal direction of a Boeing 767 mockup cabin." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/19023.

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Doctor of Philosophy<br>Department of Mechanical and Nuclear Engineering<br>M. H. Hosni<br>B. W. Jones<br>This dissertation focuses on airflow distribution in the longitudinal direction of a wide-body mockup aircraft cabin, turbulence energy and dissipation rates, and the effect of thermal plumes, generated by passengers, on airflow distribution within the cabin. The mockup cabin utilized for this study mimics a Boeing 767 passenger cabin and includes 11 rows in the longitudinal direction with each row consisting of seven seats. Each seat is occupied by an inflatable manikin which is ins

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Katurji, Marwan. "Turbulence and airflow variations in complex terrain: a modelling and field measurement approach for wind turbine siting." Thesis, University of Canterbury. Geography, 2011. http://hdl.handle.net/10092/5934.

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As the demand for global renewable energy grows, so does the demand for more efficient energy conversion machines and better wind resource assessment. The need to convert as much energy as possible with little cost remains the biggest challenge. In the wind energy sector, the quantity of the resource “wind” is not hard to locate, as with current ground and space based remote sensing technologies, and climate reanalysis techniques, the mapping of average wind speeds across the globe is achievable. The difficulty lies in identifying the “quality” of the wind resource. “Quality” is the measure of

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Andersson, Harald. "Numerical and experimental study of confluent jets supply device with variable airflow." Licentiate thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29271.

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In recent years, application of confluent jets for design of ventilation supply devices has been studied. Similarly, numerus studies have been made on the potential and application of variable air volume (VAV) in order to reduce the energy demand of ventilation systems. This study investigates the combination of supply devices based on confluent jets and VAV, both in terms of the nearfield flow behavior of the device and the impact on thermal comfort, indoor air quality and energy efficiency on a classroom-level space when the airflow rate is varied. The method used in this study is an experim

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Mishuk, Aliaksandra. "Zjednodušené počítačové modely prvků pro distribuci vzduchu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372214.

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The goal of this master thesis is to create a simplified model of an actual swirl diffuser using CFD (Computational Fluid Dynamics) simulation, so that it would be easy to calculate (would have a simple geometry, a proper mesh and would enable quick definition of the model’s boundary conditions) and would also create an airflow pattern in space as close to reality as possible. In the process a CFD model with a certain geometry was created. Subsequently, various model settings were tested. Calculation results were compared with the results of the experimental measurement done using the PIV meth

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Abou, Al-Sood Maher M. "A numerical study of a droplet evaporating in a turbulent airflow." 2007. http://hdl.handle.net/1993/20440.

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Books on the topic "Turbulent airflow"

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ITWM, Kaiserslautern Fraunhofer, and Manuel Wieland. On Modeling and Simulation of Industrial Fiber Spinning Processes : Diffusive Effects, Electrified Jets and Turbulent Airflows: Diffusive Effects, Electrified Jets and Turbulent Airflows. Fraunhofer IRB Verlag, 2020.

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Book chapters on the topic "Turbulent airflow"

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Guo, Y. P. "Sound Generation in the Ocean Under a Turbulent Airflow." In Aero- and Hydro-Acoustics. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82758-7_11.

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Radhakrishnan, H., and S. Kassinos. "Numerical Modeling of Turbulent Airflow and Particle Deposition in a Bifurcating Airway Model." In IFMBE Proceedings. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03882-2_554.

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Butterfield, G. R. "Grain transport rates in steady and unsteady turbulent airflows." In Aeolian Grain Transport 1. Springer Vienna, 1991. http://dx.doi.org/10.1007/978-3-7091-6706-9_6.

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Shen, Chen, Junjie Liu, Wei Wang, and Nan Jiang. "Experimental Measurement of Airflow Turbulence Characteristics in a Full-Size Aircraft Cabin." In Lecture Notes in Electrical Engineering. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39581-9_35.

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Carruthers, D. J., and J. C. R. Hunt. "Fluid Mechanics of Airflow over Hills: Turbulence, Fluxes, and Waves in the Boundary Layer." In Atmospheric Processes over Complex Terrain. American Meteorological Society, 1990. http://dx.doi.org/10.1007/978-1-935704-25-6_5.

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Sethuramalingam, Ramamoorthy, and Abhishek Asthana. "Design Improvement of Water-Cooled Data Centres Using Computational Fluid Dynamics." In Springer Proceedings in Energy. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63916-7_14.

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AbstractData centres are complex energy demanding environments. The number of data centres and thereby their energy consumption around the world is growing at a rapid rate. Cooling the servers in the form of air conditioning forms a major part of the total energy consumption in data centres and thus there is an urgent need to develop alternative energy efficient cooling technologies. Liquid cooling systems are one such solution which are in their early developmental stage. In this article, the use of Computational Fluid Dynamics (CFD) to further improve the design of liquid-cooled systems is discussed by predicting temperature distribution and heat exchanger performance. A typical 40 kW rack cabinet with rear door fans and an intermediate air–liquid heat exchanger is used in the CFD simulations. Steady state Reynolds-Averaged Navier–Stokes modelling approach with the RNG K-epsilon turbulence model and the Radiator boundary conditions were used in the simulations. Results predict that heat exchanger effectiveness and uniform airflow across the cabinet are key factors to achieve efficient cooling and to avoid hot spots. The fundamental advantages and limitations of CFD modelling in liquid-cooled data centre racks were also discussed. In additional, emerging technologies for data centre cooling have also been discussed.

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Ayadi, Ahmed, Abdallah Bouabidi, Zied Driss, Haithem Nasraoui, Moubarek Bsisa, and Mohamed Salah Abid. "Study of the Turbulence Model Effect on the Airflow Characteristics Inside a Solar Chimney Power Plant." In CFD Techniques and Energy Applications. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70950-5_2.

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Kardan, Farshid, Olivier Baverel, and Fernando Porté Agel. "Assessment of RANS Turbulence Models in Urban Environments: CFD Simulation of Airflow Around Idealized High-Rise Morphologies." In Humanizing Digital Reality. Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6611-5_23.

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Finnigan, J. J., and Y. Brunet. "Turbulent airflow in forests on flat and hilly terrain." In Wind and Trees. Cambridge University Press, 1995. http://dx.doi.org/10.1017/cbo9780511600425.002.

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Chen, J. M., T. A. Black, M. D. Novak, and R. S. Adams. "A wind tunnel study of turbulent airflow in forest clearcuts." In Wind and Trees. Cambridge University Press, 1995. http://dx.doi.org/10.1017/cbo9780511600425.005.

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Conference papers on the topic "Turbulent airflow"

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Halbrooks, David N., and Jie Cui. "CFD Simulation of Turbulent Airflow Around Wind Turbine Airfoils." In ASME 2013 Power Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/power2013-98180.

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The airflow around wind turbines has proved to be a difficult problem to approach by means of today’s Computational Fluid Dynamics (CFD) codes. One reason for this difficulty lies within the stall characteristics of turbine airfoils. For the purposes of this research, the popular commercial CFD code, FLUENT will be employed to facilitate the understanding of airflow around wind turbines through the study of various turbulence models. Parallel processing will be employed to enhance computational performance as well as lower simulation times. The system used for simulation is the National Renewa

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Sajjadi, H., M. Salmanzadeh, G. Ahmadi, and S. Jafari. "Lattice Boltzmann Method Simulation of Turbulent Indoor Airflow Using Hybrid LES/RANS Model." In ASME 2017 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fedsm2017-69120.

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In this study the hybrid RANS/LES turbulence model within the framework of the Lattice Boltzmann method (LBM) was used to study turbulent indoor airflows. In this approach the near wall region was simulated by the RANS model, while the bulk of the domain was analyzed using the LES model with the LBM approach. In the near wall layer where RANS was used, the k-ε turbulence model was employed. For the k-ε turbulence model in conjunction with the LBM two population balance equations for k and ε were used. The present simulation results for the airflow showed good agreement with the experimental da

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Sajjadi, H., M. Salmanzadeh, and G. Ahmadi. "Indoor Airflow Simulation Using Lattice Boltzmann Method." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21618.

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Indoor air quality (IAQ) is very important to human health and comfort as increasingly people spent most of their time in indoor environment. Numerical simulation of indoor airflows has become a significant tool for investigation of the indoor air quality. Cost effective computational methods with reasonable accuracy have the advantage of being more accessible to designers compared to more precise but expensive DNS methods. Recently developed Lattice-Boltzmann Method (LBM) has proved to be a powerful numerical technique for simulating fluid flows in various applications. In comparison with the

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Wang, Xi, Hassan Naji, and Ahmed Mezrhab. "Computational Investigation of Different Turbulent Models When Predicting Airflow in an Enclosure." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61276.

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In the present study, a numerical investigation is carried out for an isothermal case, a hot case and a cold case with FLUENT code. Three turbulence models are considered: the k-ε realisable model, the RNG k-ε model and the RSM linear model. The obtained results are compared to experiments and show generally a good agreement for the mean velocities and temperatures, but less satisfactory for the turbulent stress. The performance of the RSM model is remarkable. Even if none of the models is able to give the exact experimental pattern on the map of turbulence, the RSM model seems able to predict

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Wang, Jia-Ying, Qing-Hao Meng, Bing Luo, Xu-Yang Dai, and Ming Zeng. "Odor tracing in turbulent airflow field using only three MOX sensors." In 2017 IEEE International Conference on Robotics and Biomimetics (ROBIO). IEEE, 2017. http://dx.doi.org/10.1109/robio.2017.8324572.

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Sinclair, Jarrod, Christoph Seeling, Mladenko Kajtaz, and Stephen Dibb. "Automated Geometric Optimization of Turbulent Airflow in Ducts Using Genetic Algorithms." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56657.

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Many industrial, automotive and aerospace systems generate power from fluid flows. A common challenge in designing such components is the routing of flow within a duct or pipe geometry. However, routing is often considered secondary to the design of main components and therefore subject to compromises. Further, optimal routing designs are difficult to achieve within these constraints using current engineering tools, and are often a manual process involving computer aided design (CAD) and computer aided engineering (CAE) packages. An automated tool is therefore required for the design and optim

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Endalew, A. Melese, M. Hertog, M. A. Delele, et al. "CFD modelling of turbulent airflow through plant systems using 3D canopy architecture." In Turbulence, Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence, Heat and Mass Transfer. Begellhouse, 2009. http://dx.doi.org/10.1615/ichmt.2009.turbulheatmasstransf.1240.

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Mendes Vieira, Marcelo, Aguinaldo Soares de Oliveira, and Rômulo Pires. "Piezoelectricity induced by turbulent airflow for clean and renewable electric power generation." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-0952.

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Bella, G., and V. K. Krastev. "On the RANS Modeling of Turbulent Airflow Over a Simplified Car Model." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-23006.

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The need for reliable CFD simulation tools is a key factor for today’s automotive industry, especially for what concerns aerodynamic design driven by critical factors such as the engine cooling system optimization and the reduction of drag forces, both limited by continuously changing stylistic constraints. The Ahmed body [1] is a simplified car model nowadays largely accepted as a test-case prototype of a modern passenger car because in its aerodynamic behavior is possible to recognize many of the typical features of a light duty vehicle. Several previous works have pointed out that the flow

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Hasegawa, Mitsugu, and Hirotaka Sakaue. "Drag Reduction using Hairy Chemical Coating on NACA 0012 Airfoil in Turbulent Airflow." In 55th AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-0283.

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Reports on the topic "Turbulent airflow"

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Kurabuchi, T., J. B. Fang, and Richard A. Grot. A numerical method for calculating indoor airflows using a turbulence model. National Institute of Standards and Technology, 1990. http://dx.doi.org/10.6028/nist.ir.89-4211.

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