<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">This may be of interest to some of the subscribers to this list.<br><div><br><div>Begin forwarded message:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, 1);"><b>From: </b></span><span style="font-family:'Helvetica'; font-size:medium;">Klaus Weide <<a href="mailto:klaus@flash.uchicago.edu">klaus@flash.uchicago.edu</a>><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, 1);"><b>Date: </b></span><span style="font-family:'Helvetica'; font-size:medium;">September 14, 2012 3:28:24 PM PDT<br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, 1);"><b>To: </b></span><span style="font-family:'Helvetica'; font-size:medium;"><a href="mailto:flash-users@flash.uchicago.edu">flash-users@flash.uchicago.edu</a><br></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;"><span style="font-family:'Helvetica'; font-size:medium; color:rgba(0, 0, 0, 1);"><b>Subject: </b></span><span style="font-family:'Helvetica'; font-size:medium;"><b>[FLASH-USERS] FLASH 4.0 released</b><br></span></div><br><div>The Flash Center is pleased to announce the release of the new version of <br>the FLASH code, version 4.0. FLASH4 closely follows the architecture of <br>FLASH3. The most important changes from FLASH3 are several new <br>capabilities in both physics solvers and infrastructure. A major part of <br>the new physics capabilities were introduced to support simulations of <br>high-energy-density physics (HEDP). FLASH4 also includes four significant <br>capabilities contributed by our external users.<br><br><br>The major new capabilities in FLASH4 that were not included in FLASH3<br>are (marked with ** are the external contributions, please see the<br>User's Guide for references and appropriate credits): <br><br>* 3T capabilities in the split and unsplit Hydro solvers.<br> There is support for non-Cartesian geometry, and<br> the unsplit solver also supports stationary rigid bodies.<br><br>* Upwind biased constrained transport (CT) scheme in the unsplit<br> staggered mesh MHD solver.<br><br>* Full corner transport upwind (CTU) algorithm in the unsplit<br> hydro/MHD solver.<br><br>* Cylindrical geometry support in the unsplit<br> staggered mesh MHD solver on UG and AMR. A couple of MHD<br> simulation setups using cylindrical geometry. <br><br>* Radiation diffusion.<br><br>* Conduction.<br><br>* Heat exchange.<br><br>* Multi-Temperature Multi-Material Multi-Table Eos.<br><br>* Opacities, ability to use hot and cold opacities.<br><br>* EnergyDeposition unit with laser ray tracing, with threading<br> for performance.<br><br>* A new multipole solver.<br><br>* Ability to replicate mesh for multigroup diffusion or other<br> similar applications.<br><br>* OpenMP threading of several important solvers at both<br> coarse-grain (one block per thread) and fine-grain<br> (threads within a block) levels.<br><br>* Ability to add particles during evolution.<br><br>* Limited support for Chombo as an alternative AMR mesh package.<br><br>* Several new HEDP simulation setups.<br><br>* Hybrid PIC. **<br><br>* Barnes-Hut-Tree based gravity solver. **<br><br>* Primordial chemistry. **<br><br>* Sink particles. **<br><br><br>The release also includes several new features and resolves a number<br>of bugs found in previous releases up to 4-beta.<br><br><br>Please see the attachment for a more detailed summary,<br>and for download instructions.<br><br><br>Development of the FLASH Code was funded by the DOE-supported<br>ASC/Alliance Center for Astrophysical Thermonuclear Flashes,<br>and continues to be funded by DOE NNSA and NSF. <br>We acknowledge support received from Lawrence Livermore National<br>Laboratory and the University of Chicago.<br><br>All publications resulting from the use of the FLASH Code must<br>acknowledge the Flash Center for Computational Science.<br>Addition of the following text to the paper acknowledgments<br>will be sufficient.<br><br> "The software used in this work was in part developed by the<br> DOE- and NSF-supported Flash Center for Computational Science<br> at the University of Chicago."</div></blockquote></div></body></html>