# A public turbulence database cluster and applications to study Lagrangian evolution of velocity increments in turbulence

@article{Li2008APT, title={A public turbulence database cluster and applications to study Lagrangian evolution of velocity increments in turbulence}, author={Yi Li and Eric Perlman and Minping Wan and Yunke Yang and Charles Meneveau and Randal C. Burns and Shiyi Chen and Alexander S. Szalay and Gregory L. Eyink}, journal={Journal of Turbulence}, year={2008} }

A public database system archiving a direct numerical simulation (DNS) data set of isotropic, forced turbulence is described in this paper. The data set consists of the DNS output on 10243 spatial points and 1024 time samples spanning about one large-scale turnover time. This complete 10244 spacetime history of turbulence is accessible to users remotely through an interface that is based on the Web-services model. Users may write and execute analysis programs on their host computers, while the…

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## References

SHOWING 1-10 OF 45 REFERENCES

Data exploration of turbulence simulations using a database cluster

- Computer ScienceProceedings of the 2007 ACM/IEEE Conference on Supercomputing (SC '07)
- 2007

A new environment for the exploration of turbulent flows that uses a cluster of databases to store complete histories of Direct Numerical Simulation results and focuses on hierarchical spatial indexing, cache-sensitive spatial scheduling of batch workloads, localizing computation through data partitioning, and load balancing techniques that minimize data movement.

Decaying turbulence in an active-grid-generated flow and comparisons with large-eddy simulation

- Physics, Environmental ScienceJournal of Fluid Mechanics
- 2003

Measurements of nearly isotropic turbulence downstream of an active grid are performed as a high-Reynolds-number ($Re_{\lambda} \approx 720$) update of the Comte-Bellot & Corrsin (1971) data set.…

Velocity field statistics in homogeneous steady turbulence obtained using a high-resolution direct numerical simulation

- Physics
- 2002

Velocity field statistics in the inertial to dissipation range of three-dimensional homogeneous steady turbulent flow are studied using a high-resolution DNS with up to N=10243 grid points. The range…

Statistics and geometry of passive scalars in turbulence

- Physics
- 2005

We present direct numerical simulations of the mixing of the passive scalar at modest Taylor microscale (10⩽Rλ⩽42) and Schmidt numbers larger than unity (2⩽Sc⩽32). The simulations resolve below the…

LAGRANGIAN INVESTIGATIONS OF TURBULENCE

- Environmental Science, Physics
- 2003

Basic results in Kolmogorov similarity are examined, giving an estimate of an inertial-range universal constant and the grid resolution and Reynolds number needed to attain the requisite scaling range of time lags.

Lagrangian tetrad dynamics and the phenomenology of turbulence

- Physics
- 1999

A new phenomenological model of turbulent fluctuations is constructed by considering the Lagrangian dynamics of four points (the tetrad). The closure of the equations of motion is achieved by…

Statistics and structures of pressure in isotropic turbulence

- Physics, Environmental Science
- 1999

Statistics and structures of pressure in three-dimensional incompressible isotropic turbulence are studied using high-resolution direct numerical simulation for Taylor microscale Reynolds numbers up…

Intermittency trends and Lagrangian evolution of non-Gaussian statistics in turbulent flow and scalar transport

- Physics, Environmental ScienceJournal of Fluid Mechanics
- 2006

The Lagrangian evolution of two-point velocity and scalar increments in turbulence is considered, based on the ‘advected delta-vee system’ (Li & Meneveau 2005). This system has already been used to…

Designing and mining multi-terabyte astronomy archives: the Sloan Digital Sky Survey

- Computer Science, PhysicsSIGMOD '00
- 2000

The next-generation astronomy digital archives will cover most of the sky at fine resolution in many wavelengths, from X-rays, through ultraviolet, optical, and infrared. The archives will be stored…

Effects of small-scale turbulent motions on the filtered velocity gradient tensor as deduced from holographic particle image velocimetry measurements

- Physics
- 2002

The effects of small-scale motions on the inertial range structure of turbulence are investigated by considering the dynamics of the velocity gradient tensor (Aij) filtered at scale Δ. In addition to…