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

Joint Authors

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

Source

Mathematical Problems in Engineering

Issue

Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-10, 10 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2014-04-14

Country of Publication

Egypt

No. of Pages

10

Main Subjects

Civil Engineering

Abstract 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.

American Psychological Association (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

Modern Language Association (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

American Medical Association (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

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-495145