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4051. By Alexandros Avdis on 2012-09-09

Added test case (MMS) of advection-diffusion of passive tracer, P1DG discretisation, compact discontinuous Galerkin, and a combination of Neumman and Diriclet boundary conditions across the domain boundaries.

4050. By Alexandros Avdis on 2012-09-07

Added test-case (MMS) for correct convergence of Advection-diffusion of passive tracer, under P1DG discretisation with compact discontinuous Galerkin, and a combination of Neummann and Diriclet boundary conditions on the domain boundary.

4049. By Alexandros Avdis on 2012-09-07

Added a test-case (MMS): Advection diffusion of a passive tracer in a 3-dimensional domain with Diriclet boundary conditions on all sides. P1DG discretisation and compact discontinuous Galerkin.

4048. By Tim Greaves on 2012-09-05

As discussed in today's Fluidity developer meeting, changing this example to
default to using 64 cores to reduce runtimes for automated testing.

4047. By Christian Jacobs on 2012-09-04

Bug fix following the merge of k_epsilon_extend_and_fix. k-epsilon boundary conditions are now applied to all states that have k-epsilon enabled, not just to state(1).

4046. By Adam Candy on 2012-09-03

Wetting and Drying bug fix - the material phase had an assumed name of 'water'.
(It is now just assumed to be the first material phase)

4045. By Christian Jacobs on 2012-09-03

Buildbot's makefiles-x86_64 queue has been failing since r4042. These updates from make makefiles will hopefully fix this.

4044. By Christian Jacobs on 2012-09-02

Moved tests/mms_rans_p2p1_keps_linearmomentum and tests/mms_rans_p2p1_keps_linearmomentum_cv to the longtests directory.

4043. By Christian Jacobs on 2012-09-02

Merging k_epsilon_extend_and_fix branch into trunk.

Changes to k-epsilon model:
===========================
- The code no longer lumps the mass matrix when calculating source terms for the k and epsilon fields, allowing element pairs other than P1-P1 to be used.
- k-epsilon field calculation moved to the beginning of the time-step and calculated with all other diagnostic fields.
- Added source term to momentum equation (-2/3 grad(rho*k)).
- Updated the manual documentation for the k-epsilon model.
- Users must now use partial-stress or full-stress form for the stress term in the momentum equation. This is the correct formulation when using spatially
varying viscosities. The ScalarEddyViscosity from the model is added to all components of the stress tensor to reflect this.
- Fixed calculation of c_eps_3.
- Added lots of debugging options.
- Improved the options_check subroutine.
- Changed how prescribed source terms are implemented for the k and epsilon fields so that multiple non-linear iterations can be carried out
with prescribed source terms.
- Altered calculation of Reynolds Stresses.
- Added a new equation_type (KEpsilon) for the k-epsilon equation. This includes the density in the advection-diffusion equation for the k and epsilon fields. Also made many other changes to the code to take account of density variations. Supports CG and CV discretisations.
- Made a few preliminary steps for adding multiphase support to the k-epsilon model.
- k and epsilon fields are now clipped at Gauss points rather than nodes.
- Moved element assembly to its own subroutine to avoid dynamic memory assignment.
- Changed k and epsilon diffusivity tensor to (nu + nu_t/sigma_*) instead of (nu_t/sigma_*)
- The turbulent buoyancy term is now calculated from the VelocityBuoyancyDensity rather than a summation of scalar fields that have been identified as
being buoyant. This means that any buoyant field will automatically result in a buoyancy term in the k-epsilon model (unless the entire term
is disabled in debugging_options)
- Removed several unused variables.
- Added the buoyancy term to the k-epsilon model.
- Added damping functions for the low_Re k-epsilon model.
- Changed epsilon low_Re boundary condition to d(eps)/dx = 0 as it's simpler than what we had before and still valid (Wilcox 1998).
- Fixes to high-Re boundary conditions.
- Removed length scale limiting.

Changes to tests and examples:
==============================
- The existing k-epsilon MMS test (k-epsilon_mms_cg_p1p1) has been removed and replaced with one that uses a P2-P1 discretisation and runs to steady state.
- Three additional tests have been added for the low_Re boundary condition, and the LinearMomentum Velocity equation_type with CG and CV discretisations.
- Tests include the turbulent buoyancy term and scalar field turbulent diffusion.
- A unit test has been added for the tensor_inner_product function.
- Fixed the backward facing step 2D example based on the changes to the k-epsilon model.

4042. By Xiaohu Guo on 2012-09-01

  1. thread matrix assembly part for Advection_Diffusion_DG.F90
  2. MASSLUMPED_RT0 diffusion scheme is not supported, simply set threads back to 1 if MASSLUMPED_RT0 diffusion scheme is being used, and there will be a warning message.
  3. thread matrix assembly part for Advection_Diffusion_FV.F90