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September 25, 2013
MFIX2013-2 Release Announcement


Dear MFIX user,

We are pleased to announce the release of the new version of MFIX (MFIX2013-2). Please visit http://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 to admin@mfix.netl.doe.gov.

Regards,
MFIX Development Team


Changes from MFIX2013-1 (Date: 03/06/2013) to MFIX2013-2 (Date: 09/25/2013)

New features added:

  • Stiff chemistry model
    • The stiff chemistry solver was completely overhauled to eliminate any user coding. This capability can now be activated with a single keyword.
  • Point Source
    • The ability to specify mass inlet point source anywhere in the domain was added. This can be useful when modeling a small side inlet, without having to resolve the actual geometry.
  • Subgrid models
    • The two-fluid Igci and Milioli filtered models were implemented and can be activated by new keywords.
  • DEM cluster detection
    • An algorithm to detect clusters and collect information was implemented.

Changes in existing features:
  • Parallel execution
    • The SMP directives have been updated in key-subroutines. The SMP compilation options (including hybrid SMP+DMP) have been turned back on. Please note that the reported CPU time may be inaccurate in SMP mode.
  • Bug fixes and enhancements
    • Cyclic boundaries with pressure drop: flags CYCLIC_AT_E/N/T were corrected.

Documentation
  • Updated documents
    • Readme file [1]

Under Development:
  • Variable solids density
    • Ability to have solids density vary as a function of species composition (Eulerian/Eulerian solver)


Project Metrics:
  • Change from 2013-1 Release:
    • 13 files were removed due to stiff-solver overhaul (net count)
  • 2013-2 Total count:
    • Files: 526
    • Lines: 195,755
    • Blank Lines: 26,750
    • Code Lines: 116,321
    • Comment Lines: 56,292
    • Statements: 85,702

References:
  1. https://mfix.netl.doe.gov/documentation/Readme.pdf

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August 22, 2013
2013 Non-Newtonian Multiphase Flow Slurry Workshop


Dear MFIX user,

NETL hosted the meeting at its Morgantown campus from August 19-20, 2013. The objective of this special two-day meeting was to develop a roadmap to address technical issues associated with the handling of non-Newtonian multiphase slurries across various applications managed by Department of Energy's Office of Environmental Management (EM). These include the Tank Farm Project and Waste Treatment & immobilization Plant (WTP) Project, which store, mobilize, and transport slurries at the Hanford Office of River Protection (ORP) in Richland, WA. Please visit the workshop page for additional details.
Regards,
MFIX Development Team


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June 27, 2013
2013 NETL's Multiphase Flow Workshop


Dear MFIX user,

The U.S. Department of Energy - National Energy Technology Laboratory (NETL) is pleased to announce the 2013 Workshop on Multiphase Flow Science. This year's workshop will be held on Tuesday, August 6 through Wednesday, August 7, 2013, at Lakeview Golf Resort & Spa, 150 Lakeview Drive, Morgantown WV 26508. The workshop will consist of two full days, Tuesday and Wednesday. This event will bring together international leaders from industry, academia, and government laboratories in the area of multiphase flow science to discuss current research projects and discuss future research and development needs in the area of multiphase flow science. more...
Regards,
MFIX Development Team


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April 04, 2013
C3M Release Announcement


Dear MFIX user,

We are pleased to announce the release C3M (Carbonaceous Chemistry for Computational Modeling). C3M is a chemistry management software focused on computational modeling of reacting systems. Please visit the C3M download page to download the latest version.
Regards,
MFIX Development Team


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March 06, 2013
MFIX2013-1 Release Announcement


Dear MFIX user,

We are pleased to announce the release of the new version of MFIX (MFIX2013-1). Please visit http://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 to admin@mfix.netl.doe.gov.

Regards,
MFIX Development Team


Changes from MFIX2012-1 (Date: 01/19/2012) to MFIX2013-1 (Date: 03/06/2013)

New features added:

  • Hybrid model
    • Ability to describe different solids phases in either Eulerian or Lagrangian frames
  • MPPIC (Multi-Phase Particle in Cell)
    • Eulerian model for carrier phase coupled with particle-in-cell (PIC) based discrete representation for dispersed phase
    • Tentative release to handle cut-cells
  • DEM
    • Tentative release to handle cut-cells

Changes in existing features:
  • Bug fixes and enhancements:
    • Makefile
      • Improved user input
      • Object files are stored in dedicated directories to speed-up recompilation
  • Reaction rate input
    • New user-friendly input method to define chemical reactions in input file
    • Simplification of user-defined reaction rate specification
    • Heats of reaction are automatically calculated
  • Parallel execution
    • SMP mode of execution was turned off due to current assesment of OpenMP directives
  • Cartesian Grid cut cell technique
    • Improvement in handling geometry intersections
    • Geometry input from multiple STL files

Documentation
  • Updated documents
    • Readme file [1]
    • Cartesian grid documentation [2]
  • New documents
    • MPPIC documentation [3]
    • MPI verification [4]
    • Compiler study [5]

Under Development:
  • Stiff solver: Automatic parsing to elimnate user-input for Direct Integration method
  • Variable solids density
    • Ability to have solids density vary as a function of species composition (Eulerian/Eulerian solver)
  • Parallel execution
    • Updated OpenMP directives


Project Metrics:
  • Change from 2012-1 Release:
    • 20 new files
    • Nearly 11,000 new lines of code (around 7,000 excluding comments and blank lines)
  • 2013-1 Total count:
    • Files: 539
    • Lines: 192,460
    • Blank Lines: 25,376
    • Code Lines: 114,993
    • Comment Lines: 55,510
    • Statements: 85,098

References:
  1. https://mfix.netl.doe.gov/documentation/Readme.pdf
  2. https://mfix.netl.doe.gov/documentation/Cartesian_grid_user_guide.pdf
  3. https://mfix.netl.doe.gov/documentation/mfix_pic_doc.pdf
  4. https://mfix.netl.doe.gov/documentation/MPI_verification_for_MFIX.pdf
  5. https://mfix.netl.doe.gov/documentation/MFIX_results_sensitivity_to_Fortran_compilers.pdf

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March 21, 2012
NETL's Breakthrough Video featuring MFIX


Dear MFIX user,

The U.S. Department of Energy - National Energy Technology Laboratory (NETL) has released a video on YouTube to showcase MFIX. The video is part of a group of videos that showcase "Breakthroughs from National Labs".  Please follow this link to view the video.

Regards,
MFIX Development Team

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February 15, 2012
2012 NETL's Multiphase Flow Workshop


Dear MFIX user,

The U.S. Department of Energy - National Energy Technology Laboratory (NETL) is pleased to announce the 2012 Conference on Multiphase Flow Science will be held in Morgantown, WV from May 22 to May 24, 2012.The goal of the conference continues to be advancing the use of physics-based multiphase simulations to help overcome the technical barriers associated with the development of highly efficient, environmentally acceptable energy technologies and processes. more...

Regards,
MFIX Development Team

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January 19, 2012
MFIX2012-1 Release Announcement


Dear MFIX user,

We are pleased to announce the release of the new version of MFIX (MFIX2012-1). Please visit http://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 to admin@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

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September 07, 2011
2011 NETL's Multiphase Flow Workshop


Dear MFIX user,

The annual multiphase flow sciences workshop, hosted by NETL's Multiphase Flow Research Team, was held on August 16-18 in Pittsburgh, PA. Over eighty researchers from around the world attended. During the three day workshop, 40 presentations were made covering areas of interest to the multiphase community, such as fundamental multiphase model development, application of advance diagnostic tools to gas-solid flows, oxy-combustion, gasification, chemical looping, and CO2 adsorption. In keeping with the 2006 Multiphase Flow Technology Roadmap, an entire afternoon session was devoted to the quantification of uncertainty and its application to the area of multiphase flows. During the workshop, a meeting was held with researchers from Ames Lab, LLNL, Virginia Tech, and NETL's multiphase research team to discuss future collaborative work in the area of uncertainty quantification in gas-solid flows. Also, the results of the most recent NETL-PSRI multiphase Challenge Problem were presented. Feedback provided by the participants will be incorporated into the next multiphase challenge problem scheduled for 2012-2013. The 2011 multiphase workshop proceedings can be viewed at http://www.netl.doe.gov/publications/proceedings/11/mfs/index.html.

Regards,
MFIX Development Team

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January 18, 2011
Polydispersity and Multiphase Modeling


Dear MFIX user,

The results, to date, of NETL funded research project entitled "Development, Verification, and validation of Multiphase Models for Polydisperse Flows" being conducted by a team of researchers from University of Colorado, PSRI, Iowa State University, and Princeton University have been released and are available at http://www.psriextra.com/AR_Polydispersity_Open/AR_Polydispersity_Open/Welcome.html .

Regards,
MFIX Development Team

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November 1, 2010
Challenge problem experimental results are available


Dear MFIX user,

NETL, in collaboration with PSRI, has released experimental data for the Challenge Problems. Data is available for the NETL's Circulating Fluidized Bed and PSRI's bubbling fluid bed. Please visit the Challenge Problem section to view or download the data.

Regards,
MFIX Development Team

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February 2, 2010
MFIX2010-1 Release Announcement


Dear MFIX user,

We are pleased to announce the release of the new stable version of MFIX (MFIX2010-1). Please visit http://mfix.netl.doe.gov/members/download.php to download the latest version. Please see the attached release notes that highlight the changes from the previous version.

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

Regards,
MFIX Development Team


Changes from MFIX2007-4 (Date: 12/31/2007) to MFIX2010-1 (Date: 02/02/2010)

Changes in existing features:

  • Bug fixes and enhancements:
    • Solids inventory reporting problem for parallel runs
    • Unit conversion from CGS to SI for dimensional quantities.
    • Print format changes to accommodate processor counts > 100
  • Enhancements:
    • Semi-implicit treatment of IA conductivity term
    • Conducted extensive debugging and verification of the DEM code
    • Updated DEM test cases
  • Updated documents:
    • Equations document [1]
    • Readme file [2]

New features added:
  • HYS polydisperse drag model and test case
    • The Holloway, Yin and Sundaresan (HYS) drag relation accounts for the effect of finite Reynolds number on the fluid-particle drag experienced by particles in polydisperse suspensions.
    • The HYS drag model is described in mfix/doc/HYS_drag.pdf.
  • DEM
    • Expanded DEM code so particles of differing size and density can be modeled (polydispersity).
    • Added a second order integration method (Adams Bashforth) to DEM as an option (DES_INTG_METHOD).
    • Added the Hertzian collision model to DEM as an option (DES_COLL_MODEL).
    • Created an updated user guide/document for the DEM code that includes a discussion on theory, numerics, and the verification tests [3]
  • Cartesian Grid cut cell technique
    • This new capability allows the definition of curved or sloping boundaries, instead of the usual stair-step representation.
    • Computational cells are truncated at the wall to conform to the shape of the boundaries.
    • The Cartesian grid technique is available for the Euler-Euler approach and includes no-slip and free-slip boundary conditions for either gas or solids phases.
    • A user guide describing the utilization of the cut cell technique is located in mfix/doc/Cartesian_grid_user_guide.pdf [4].
    • Some tutorials located at mfix/Cartesian_grid_tutorials illustrate the new capability.
  • Distributed I/O
  • Option to compile using gfortran

Under Development:
  • GHD (Garzo, Hrenya, and Dufty) granular kinetic theory
    • Code was updated with GHD granular kinetic theory and a simple shear flow case was added to tests/GHD to show how this model is used.
    • The major difference between this theory and previous KT's that it solves mixture momentum and granular energy equations instead of the individual solids phases equations.
    • Currently this theory is for granular flows (no fluid) and only simple wall BC can be applied (i.e. no slip, free slip)
    • The effect of fluid-solid drag was included in the GHD theory.
  • DEM
    • Adding inlet/outlet capabilities to DEM


References
  1. S. Benyahia, M. Syamlal, T.J. O'Brien, "Summary of MFIX Equations", From URL
    https://mfix.netl.doe.gov/documentation/MfixEquations2005-4-4.pdf, August 2009.
  2. https://mfix.netl.doe.gov/documentation/Readme.pdf
  3. https://mfix.netl.doe.gov/documentation/dem_doc_2010.pdf
  4. http://mfix.netl.doe.gov/documentation/Cartesian_grid_user_guide.pdf

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January 27, 2010
NETL receives INCITE Award to conduct Large Scale Simulations


Dear MFIX user,

We are pleased to announce that a team of researchers at NETL has been awarded 6 Million processors hours through the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program. The title of the project is "Clean and Efficient Coal Gasifier Designs Using Large-Scale Simulations". The allocated computational resources will allow researchers to conduct high-fidelity simulations of a commercial-scale Clean Coal Power Initiative (CCPI) transport gasifier. MFIX will be used to conduct the simulations the Department of Energy Office of Science).

Details about the INCITE award can be found at:

http://www.energy.gov/news2009/8557.htm
http://www.er.doe.gov/ascr/incite/index.html

Regards,
MFIX Development Team

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November 5, 2009
Madhava Syamlal discussing the utilization of MFIX to model a gasifier


Dear MFIX user,

Please follow the link below to view a video featuring Madhava Syamlal (Focus Area Leader for Computational and Basic Sciences at NETL). The video discusses the utilization of MFIX to model a gasifier. The video is hosted by ASCR DISCOVERY (Office of Advanced Scientific Computing Research in the Department of Energy Office of Science).

http://ascr-discovery.science.doe.gov/NETL_vid/syamlal_vid.shtml

The article accompanying the video can be found at:

http://ascr-discovery.science.doe.gov/synchronized/syamlal1.shtml

Regards,
MFIX Development Team

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October 1, 2009
The 2009 NETL Workshop on Multiphase Flow Science


Dear MFIX user,

The 2009 Workshop on Multiphase Flow Science was held in Morgantown, WV, on April 22-23, 2009, and regrouped 66 participants from the industry and academia. The proceeding from the workshop can be found at: http://www.netl.doe.gov/publications/proceedings/09/mfs/index.html

Regards,
MFIX Development Team

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April 27, 2008
Paper on open-source experience with MFIX


Dear MFIX user,

The following paper discussing the open source experiences with MFIX has been published: Madhava Syamlal, Thomas J. O'Brien, Sofiane Benyahia, Aytekin Gel, and Sreekanth Pannala, Open-Source Software in Computational Research: A Case Study, Modelling and Simulation in Engineering, vol. 2008, Article ID 937542, 10 pages, 2008. doi:10.1155/2008/937542. You may access this article from the Table of Contents of Volume 2008, which is located at the following link: http://www.hindawi.com/journals/mse/volume-2008/ Alternatively, you may directly access your article at the following location: http://www.hindawi.com/getarticle.aspx?doi=10.1155/2008/937542

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December 31, 2007
MFIX2007-4 Release Announcement


Dear MFIX user,

We are pleased to announce the release of the new stable version of MFIX (MFIX2007-4). Please visit http://mfix.netl.doe.gov/members/download.php to download the latest version. Please see the attached release notes that highlight the changes from the previous version.

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

Regards,

MFIX Development Team

Changes from MFIX2006-4 to MFIX2007-4 (Date: 12/31/2007)

Changes in existing features:

  • Significant bug fixes were made to the DEM model implemented in MFIX (see log listing at [1]). Most of the modifications were made by Rahul Garg at Iowa State during his summer internship at NETL. Here is a brief summary of the changes:
    • Number of bug fixes and enhancements were made to handle general multiparticle mixtures with varying density as well as particle size
    • The code has tested 2D and 3D capability
  • Added/modified some test cases and tutorial cases. The test and tutorial cases are benchmarked and the summary tables are located in respective directories.
  • Several bug fixes and please have a look at the log history for a more detailed list of changes at [2]. Some notable ones are:
    • Fixed an error in the calculation of the enthalpy transfer because of mass transfer
    • The divergence terms are called consistently when solids viscosity is a constant
    • Bug fixed for wall cells that may be tagged as fluid in cyclic cases
    • Changed old-time velocity V_s0 to current velocity U_s, V_s and W_s in calc_s_ddot_s. This will accelerate convergence.
    • Moved read_database call from check_data_01 to check_data_06
  • Updated equations document [3]
  • Updated Readme - part of the distribution and readily available from [4]
New features added:
  • The following additions were made to the DEM code [5]:
    • A new and efficient cell linked list based search algorithm has been implemented and tested in 3-D DEM simulations
    • Added an interpolation suite that can be turned on to calculate the individual drag forces on the particles based on particle locations rather than cell averages
    • Added a small tool to generate input deck for DEM cases for multiparticle mixtures in mfix/tools/DES_Particle_Generator/
  • Make file has following additions
    • Option to compile using g95 under Cygwin
    • Modified the selection table under 32 bit compilers, instead of multiple questions for versions of Intel compiler etc., everything is under single list similar to 64 bit compiler options
    • Have an option to link dgtsv if machine optimized libraries are available
    • The make_file has additional options for CRAY XT3/XT4 systems
  • Modifications to make an optimized scalable version of MFIX for large parallel machines
    • The residual calculations are collected into 4 calls for every iteration
    • The dot-products in BiCGStab are reduced by almost 50%
    • Additional preconditioning (alternating sweep directions) and solver options (CG, SOR) have been added
    • Additional tools to collect statistics about scalability and load-balance
References
  1. http://mfix.netl.doe.gov/cgi-bin/cvsweb.cgi/mfix/model/des/#dirlist
  2. http://mfix.netl.doe.gov/cgi-bin/cvsweb.cgi/mfix/model/#dirlist
  3. S. Benyahia, M. Syamlal, T.J. O’Brien, “Summary of MFIX Equations 2005-4”, From URL http://mfix.netl.doe.gov/documentation/MfixEquations2005-4-3.pdf, July 2007.
  4. http://mfix.netl.doe.gov/documentation/Readme.pdf
  5. The MFIX-DEM document is currently being updated and the DEM mailing list will be informed as soon as the document is available.

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July 19, 2007
MFIX won the 2007 R&D 100 Award


Since 1963, R&D Magazine has annually awarded R&D 100 Awards to the 100 most technologically significant new products to hit the market during the year. According to R&D Magazine, the goal of the award is to spotlight major breakthroughs in products and processes with the capacity to improve the standard of living for many people. Read more about it at http://www.netl.doe.gov/newsroom/features/07-2007.html#mfix or http://www.fossil.energy.gov/news/techlines/2007/07058-FE_Technologies_Win_Awards.html

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