MFIX2012-1 Release Announcement

Dear MFIX user,

We are pleased to announce the release of the new version of MFIX (MFIX2012-1). Please visithttps://mfix.netl.doe.gov/members/download.php to download the latest version. Please see the release notes below that highlight the changes from the previous version.

Please send any software related questions to mfix-help@mfix.netl.doe.gov or administrative questions toadmin@mfix.netl.doe.gov.

Regards,
MFIX Development Team

Changes from MFIX2010-1 (Date: 02/02/2010) to MFIX2012-1 (Date: 01/19/2012)

New features added:

• DEM
  • DMP Parallelization (MPI)
  • SMP Parallelization (OpenMP)
  • Mass inlet and outlet boundary conditions
  • Heat transfer and DES reactive chemistry
  • Cohesion van der Waals force calculation with/without Rumpf corrections to asperities on surface of particles
• Virtual mass
  • Virtual mass force acts to increase the inertia of the dispersed phase, which tends to stabilize simulations of bubbly gas-liquid flows
• GHD (Garzo, Hrenya, and Dufty) granular kinetic theory
  • The GHD model solves mixture momentum and granular energy equations instead of the individual solids phases equations
• Cartesian Grid cut cell technique
  • Partial slip boundary condition
  • K-epsilon wall functions
  • Energy equation
  • Geometry input from STL file and Gambit msh file (3D)
• Quadrature method of moments (QMOM)
  • Solves moment transport equations for the particle phase [1]

Changes in existing features:

• Bug fixes and enhancements:
  • Gfortran compilation: various format statement and line continuation were modified to accommodate gfortran
  • Chi scheme
    • Bug fix: ensure species mass fractions add to one
    • Enhancement: vanishing species no longer degrade the 2nd order scheme to FOU
• Updated documents:
  • Readme file [2]
  • DEM documentation [3]
  • Cartesian grid documentation [4]
  • Summary of MFIX equations [5]

Under Development:

• MPPIC: Multi-Phase Particle in Cell
• Application of Cartesian cut-cell technique to DEM
• Variable solids density

Project Metrics:

• Change from 2010-1 Release:
  • 50 new files
  • Nearly 38,000 new lines of code (around 23,000 excluding comments and blank lines)
• 2012-1 Total count:
  • Files: 519
  • Lines: 181092
  • Blank Lines: 23108
  • Code Lines: 107651
  • Comment Lines: 53285
  • Statements: 80529

References:

1. https://mfix.netl.doe.gov/documentation/qmomk_doc_2012-1.pdf
2. https://mfix.netl.doe.gov/documentation/Readme.pdf
3. https://mfix.netl.doe.gov/documentation/dem_doc_2012-1.pdf
4. https://mfix.netl.doe.gov/documentation/Cartesian_grid_user_guide.pdf
5. https://mfix.netl.doe.gov/documentation/MfixEquations2012-1.pdf