Close this search box.


Some content and downloads on this site are only available to approved members. To request access to all content, please use the form below to create an account. Registration is free and easy, but does not provide immediate access to restricted content. Please use English characters only to fill-up the form.

Account Moderation

All accounts are manually moderated. After submitting, PLEASE DO NOT RE-REGISTER. We will review the information you have provided and let you know if we need any additional information. Assuming that all of the required information is available, your account will be given access to the restricted content and downloads on the site. We will inform you via e-mail once your account has been set up (typically within one or two days).

If you have any questions or special requests, send an e-mail to


Other Information






Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed or represents that its use would not infringe privately owned rights.

MFIX is provided without any user support for applications in the user's immediate organization. It should not be redistributed in whole or in part.

The use of MFIX is to be acknowledged in any published paper based on computations using this software by citing the MFIX theory manual. MFIX is being developed at NETL with active collaboration from ORNL and funding through OIT of DOE. Some of the submodels are being developed by researchers outside of NETL. The use of such submodels is to be acknowledged by citing the appropriate papers of the developers of the submodels.

The authors would appreciate receiving any reports of bugs or other difficulties with the software, enhancements to the software, and accounts of practical applications of this software.