Direct Numerical Simulation and Large Eddy Simulation on a Turbulent Wall-Bounded Flow Using Lattice Boltzmann Method and Multiple GPUs

المؤلفون المشاركون

Onodera, Naoyuki
Shangguan, Yanqin
Aoki, Takayuki
Wang, Xian
Kobayashi, Hiromichi

المصدر

Mathematical Problems in Engineering

العدد

المجلد 2014، العدد 2014 (31 ديسمبر/كانون الأول 2014)، ص ص. 1-10، 10ص.

الناشر

Hindawi Publishing Corporation

تاريخ النشر

2014-04-14

دولة النشر

مصر

عدد الصفحات

10

التخصصات الرئيسية

هندسة مدنية

الملخص EN

Direct numerical simulation (DNS) and large eddy simulation (LES) were performed on the wall-bounded flow at Reτ=180 using lattice Boltzmann method (LBM) and multiple GPUs (Graphic Processing Units).

In the DNS, 8 K20M GPUs were adopted.

The maximum number of meshes is 6.7×107, which results in the nondimensional mesh size of Δ+=1.41 for the whole solution domain.

It took 24 hours for GPU-LBM solver to simulate 3×106 LBM steps.

The aspect ratio of resolution domain was tested to obtain accurate results for DNS.

As a result, both the mean velocity and turbulent variables, such as Reynolds stress and velocity fluctuations, perfectly agree with the results of Kim et al.

(1987) when the aspect ratios in streamwise and spanwise directions are 8 and 2, respectively.

As for the LES, the local grid refinement technique was tested and then used.

Using 1.76×106 grids and Smagorinsky constant (Cs)=0.13, good results were obtained.

The ability and validity of LBM on simulating turbulent flow were verified.

نمط استشهاد جمعية علماء النفس الأمريكية (APA)

Wang, Xian& Shangguan, Yanqin& Onodera, Naoyuki& Kobayashi, Hiromichi& Aoki, Takayuki. 2014. Direct Numerical Simulation and Large Eddy Simulation on a Turbulent Wall-Bounded Flow Using Lattice Boltzmann Method and Multiple GPUs. Mathematical Problems in Engineering،Vol. 2014, no. 2014, pp.1-10.
https://search.emarefa.net/detail/BIM-495145

نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)

Wang, Xian…[et al.]. Direct Numerical Simulation and Large Eddy Simulation on a Turbulent Wall-Bounded Flow Using Lattice Boltzmann Method and Multiple GPUs. Mathematical Problems in Engineering No. 2014 (2014), pp.1-10.
https://search.emarefa.net/detail/BIM-495145

نمط استشهاد الجمعية الطبية الأمريكية (AMA)

Wang, Xian& Shangguan, Yanqin& Onodera, Naoyuki& Kobayashi, Hiromichi& Aoki, Takayuki. Direct Numerical Simulation and Large Eddy Simulation on a Turbulent Wall-Bounded Flow Using Lattice Boltzmann Method and Multiple GPUs. Mathematical Problems in Engineering. 2014. Vol. 2014, no. 2014, pp.1-10.
https://search.emarefa.net/detail/BIM-495145

نوع البيانات

مقالات

لغة النص

الإنجليزية

الملاحظات

Includes bibliographical references

رقم السجل

BIM-495145