Johns Hopkins Turbulence Databases





Transitional boundary layer

Dataset description

Transitional boundary layer:

Simulation data provenance: Dr. Jin Lee and Prof. Tamer Zaki of JHU (see README-transition_bl for more details).

  • Direct numerical simulation (DNS) of a transitional boundary layer over a plate with an elliptical leading edge.
  • Navier-Stokes was discretized on a curvilinear grid and solved using a finite volume DNS code.
  • A fractional-step algorithm was adopted, and the spatial discretization was a staggered volume-flux formulation.
  • The viscous terms were integrated in time implicitly using the Crank-Nicolson and the advections terms were treated explicitly using the Adams-Bashforth.
  • Pressure was treated using implicit Euler in the δp-form. The pressure equation was Fourier transformed in the span, and the resulting Helmholtz equation was solved for every spanwise wavenumber using two-dimensional multi-grid.
  • After the simulation has reached a statistical stationary state, 4701 frames of data, which includes the 3 components of the velocity vector and the pressure, are generated and written in files that can be accessed directly by the database (FileDB system).
  • Since the grid is staggered, data at the wall are not stored in the database. However, JHTDB provides values in the region between the wall and the first grid point, y∈[0, 0.0036], using 4th-order Lagrange polynomial inter- and extrapolation.
  • The y-locations of the grid points in the vertical direction can be downloaded from this text file.
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Last update: 5/3/2018 12:52:14 PM