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  1. 26 Jun, 2019 5 commits
  2. 25 Jun, 2019 7 commits
  3. 24 Jun, 2019 10 commits
  4. 21 Jun, 2019 5 commits
    • Andrew Heather's avatar
      Merge branch 'feature-digitalFilterFvPatchInlet' into 'develop' · 9370053b
      Andrew Heather authored
      Digital-Filter Based Synthetic Turbulence Generation Method for LES/DES Inflow
      
      See merge request !235
      9370053b
    • Kutalmis Bercin's avatar
      TUT: add new tutorial case for turbulent inflow BCs · a31a0103
      Kutalmis Bercin authored
      The following three synthetic turbulence inflow boundary conditions are
      examined through single-cell-domain smooth-wall plane channel flow setup:
      
      - turbulentDFSEMInlet
      - turbulentDigitalFilterInlet variant=digitalFilter
      - turbulentDigitalFilterInlet variant=reducedDigitalFilter
      
      The examinations are performed in terms of the first-/second-order turbulence
      statistics provided by (Moser et al., (1999)) doi.org/10.1063/1.869966
      from smooth-wall plane channel flow direct numerical simulations at Re=395.
      
      Serial executing:
      
      ./Allrun
      
      Parallel (decompositionMethod=scotch) executing:
      
      ./Allrunparallel
      a31a0103
    • Kutalmis Bercin's avatar
      ENH: Digital-Filter Based Synthetic Turbulence Generation Method for LES/DES Inflows · d6aac2ac
      Kutalmis Bercin authored
          Velocity boundary condition generating synthetic turbulence-alike
          time-series for LES and DES turbulent flow computations.
      
          To this end, two synthetic turbulence generators can be chosen:
          - Digital-filter method-based generator (DFM)
      
          \verbatim
          Klein, M., Sadiki, A., and Janicka, J.
              A digital filter based generation of inflow data for spatially
              developing direct numerical or large eddy simulations,
              Journal of Computational Physics (2003) 186(2):652-665.
              doi:10.1016/S0021-9991(03)00090-1
          \endverbatim
      
          - Forward-stepwise method-based generator (FSM)
      
          \verbatim
          Xie, Z.-T., and Castro, I.
              Efficient generation of inflow conditions for large eddy simulation of
              street-scale flows, Flow, Turbulence and Combustion (2008) 81(3):449-470
              doi:10.1007/s10494-008-9151-5
          \endverbatim
      
          In DFM or FSM, a random number set (mostly white noise), and a group
          of target statistics (mostly mean flow, Reynolds stress tensor profiles and
          length-scale sets) are fused into a new number set (stochastic time-series,
          yet consisting of the statistics) by a chain of mathematical operations
          whose characteristics are designated by the target statistics, so that the
          realised statistics of the new sets could match the target.
      
          Random number sets ---->-|
                                   |
                               DFM or FSM ---> New stochastic time-series consisting
                                   |           turbulence statistics
          Turbulence statistics ->-|
      
          The main difference between DFM and FSM is that the latter replaces the
          streamwise convolution summation in DFM by a simpler and a quantitatively
          justified equivalent procedure in order to reduce computational costs.
          Accordingly, the latter potentially brings resource advantages for
          computations involving relatively large length-scale sets and small
          time-steps.
      d6aac2ac
    • Kutalmis Bercin's avatar
      371ec731
    • Andrew Heather's avatar
      TUT: Tuorial updates · 0d72096e
      Andrew Heather authored
      0d72096e
  5. 20 Jun, 2019 5 commits
  6. 19 Jun, 2019 8 commits
    • Andrew Heather's avatar
      Merge branch 'integration-adjoint' into 'develop' · b8ab49ef
      Andrew Heather authored
      Integration adjoint
      
      See merge request !269
      b8ab49ef
    • Vaggelis Papoutsis's avatar
      CONTRIB: New adjoint optimisation and tools · 32b7d7c2
      Vaggelis Papoutsis authored
      A set of libraries and executables creating a workflow for performing
      gradient-based optimisation loops. The main executable (adjointOptimisationFoam)
      solves the flow (primal) equations, followed by the adjoint equations and,
      eventually, the computation of sensitivity derivatives.
      
      Current functionality supports the solution of the adjoint equations for
      incompressible turbulent flows, including the adjoint to the Spalart-Allmaras
      turbulence model and the adjoint to the nutUSpaldingWallFunction, [1], [2].
      
      Sensitivity derivatives are computed with respect to the normal displacement of
      boundary wall nodes/faces (the so-called sensitivity maps) following the
      Enhanced Surface Integrals (E-SI) formulation, [3].
      
      The software was developed by PCOpt/NTUA and FOSS GP, with contributions from
      
      Dr. Evangelos Papoutsis-Kiachagias,
      Konstantinos Gkaragounis,
      Professor Kyriakos Giannakoglou,
      Andy Heather
      
      and contributions in earlier version from
      
      Dr. Ioannis Kavvadias,
      Dr. Alexandros Zymaris,
      Dr. Dimitrios Papadimitriou
      
      [1] A.S. Zymaris, D.I. Papadimitriou, K.C. Giannakoglou, and C. Othmer.
      Continuous adjoint approach to the Spalart-Allmaras turbulence model for
      incompressible flows. Computers & Fluids, 38(8):1528–1538, 2009.
      
      [2] E.M. Papoutsis-Kiachagias and K.C. Giannakoglou. Continuous adjoint methods
      for turbulent flows, applied to shape and topology optimization: Industrial
      applications. 23(2):255–299, 2016.
      
      [3] I.S. Kavvadias, E.M. Papoutsis-Kiachagias, and K.C. Giannakoglou. On the
      proper treatment of grid sensitivities in continuous adjoint methods for shape
      optimization. Journal of Computational Physics, 301:1–18, 2015.
      
      Integration into the official OpenFOAM release by OpenCFD
      32b7d7c2
    • Andrew Heather's avatar
      STYLE: Updated FO output · 51910c6c
      Andrew Heather authored
      51910c6c
    • Andrew Heather's avatar
      b006d337
    • mattijs's avatar
      ENH: scotch: make repeatable. Fixes #1274. · 45b0aed8
      mattijs authored
      45b0aed8
    • Andrew Heather's avatar
      STYLE: Updated header documentation · 236d5f8a
      Andrew Heather authored
      236d5f8a
    • Andrew Heather's avatar
    • Andrew Heather's avatar
      ENH: Refactored pressure function object · 3c050d96
      Andrew Heather authored
      3c050d96