ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 0.7

ISSN 印刷: 1940-2503
ISSN オンライン: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.2012003883
pages 1-22

NUMERICAL SIMULATION OF A TURBULENT FREE JET ISSUING FROM A RECTANGULAR NOZZLE

Mohsen Akbarzadeh
Department of Mechanical and Manufacturing Engineering, University of Manitoba, Winnipeg, Manitoba, R3T 5V6, Canada
Madjid Birouk
Department of Mechanical and Manufacturing Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6 Canada
Brahim Sarh
ICARE-CNRS, 1С Avenue de la Recherche Scientifique, Orléans 4571, France

要約

The aim of this paper is to demonstrate that the simple Reynolds-averaged Navier-Stokes (RANS) two-equation standard kε turbulence model is capable of predicting the main characteristics of turbulent free jets issuing from three-dimensional complex rectangular nozzle geometry. This paper also investigates the main characteristics of turbulent rectangular free shear jets by varying the nozzle aspect ratio. The computations were performed by using RANS equations and the turbulence terms were handled by testing the standard two-equation kε or kω turbulence models. The solution of the governing equations was obtained by using the finite volume method (FVM), where the SIMPLEC algorithm was adopted with a staggered grid to prevent decoupling velocity and pressure fields. The inflow boundary conditions including the inflow velocity profile and the turbulence intensity level were adopted from published experimental data. The main results demonstrate that the standard kε model, when applied with appropriate inflow boundary conditions, provides successful predictions of the main features of turbulent free jets issuing from rectangular nozzles, including the decay rate in the near- and far-field region, the spreading rate except in the very near field, vena contracta, and axis switching. The numerical results show also that increasing the nozzle aspect ratio leads to an increase in fluid entrainment closer to the nozzle exit in the near field, which is in complete agreement with experimental observations.


Articles with similar content:

Measurements of the Statistical Distribution of the Scalar Dissipation Rate in Turbulent Axisymmetric Plumes
ICHMT DIGITAL LIBRARY ONLINE, Vol.10, 2006, issue
Christos N. Markides, Epaminondas Mastorakos
FLOW AND HEAT TRANSFER CHARACTERISTIC OF TURBULENT PLANE WALL JET INTERACTING WITH COFLOWING FREESTREAM
Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017), Vol.0, 2017, issue
Sushil Kumar Rathore, Satish Kumar Yadav
Remaining Challenges in Measurements and Computations of Three-dimensional Turbulent Boundary Layers
ICHMT DIGITAL LIBRARY ONLINE, Vol.10, 2006, issue
I. Pelivan, Hassan M. Nagib, K. Chauhan, S. Gravante
NUMERICAL INVESTIGATION OF INLET CONDITION EFFECT ON THERMO-FLUID CHARACTERISTICS OF TURBULENT PLANE JET
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2009, issue
Bijan Farhanieh, Ehsan Faghani, Hesam Anvari Ardakani, Navid Samadi Vaghefi, Sina Amini Niaki
PERFORMANCE OF RNG TURBULENCE MODELLING FOR TURBULENT FORCED CONVECTIVE HEAT TRANSFER IN DUCTS
ICHMT DIGITAL LIBRARY ONLINE, Vol.3, 1997, issue
Masoud Rokni, Bengt Sunden