Large Eddy Simulation of Unstably Stratified Turbulent Flow over Urban-Like Building Arrays

المؤلفون المشاركون

Wang, Bobin
Cui, Guixiang

المصدر

Journal of Applied Mathematics

العدد

المجلد 2013، العدد 2013 (31 ديسمبر/كانون الأول 2013)، ص ص. 1-10، 10ص.

الناشر

Hindawi Publishing Corporation

تاريخ النشر

2013-12-05

دولة النشر

مصر

عدد الصفحات

10

التخصصات الرئيسية

الرياضيات

الملخص EN

Thermal instability induced by solar radiation is the most common condition of urban atmosphere in daytime.

Compared to researches under neutral conditions, only a few numerical works studied the unstable urban boundary layer and the effect of buoyancy force is unclear.

In this paper, unstably stratified turbulent boundary layer flow over three-dimensional urban-like building arrays with ground heating is simulated.

Large eddy simulation is applied to capture main turbulence structures and the effect of buoyancy force on turbulence can be investigated.

Lagrangian dynamic subgrid scale model is used for complex flow together with a wall function, taking into account the large pressure gradient near buildings.

The numerical model and method are verified with the results measured in wind tunnel experiment.

The simulated results satisfy well with the experiment in mean velocity and temperature, as well as turbulent intensities.

Mean flow structure inside canopy layer varies with thermal instability, while no large secondary vortex is observed.

Turbulent intensities are enhanced, as buoyancy force contributes to the production of turbulent kinetic energy.

نمط استشهاد جمعية علماء النفس الأمريكية (APA)

Wang, Bobin& Cui, Guixiang. 2013. Large Eddy Simulation of Unstably Stratified Turbulent Flow over Urban-Like Building Arrays. Journal of Applied Mathematics،Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-497701

نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)

Wang, Bobin& Cui, Guixiang. Large Eddy Simulation of Unstably Stratified Turbulent Flow over Urban-Like Building Arrays. Journal of Applied Mathematics No. 2013 (2013), pp.1-10.
https://search.emarefa.net/detail/BIM-497701

نمط استشهاد الجمعية الطبية الأمريكية (AMA)

Wang, Bobin& Cui, Guixiang. Large Eddy Simulation of Unstably Stratified Turbulent Flow over Urban-Like Building Arrays. Journal of Applied Mathematics. 2013. Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-497701

نوع البيانات

مقالات

لغة النص

الإنجليزية

الملاحظات

Includes bibliographical references

رقم السجل

BIM-497701