<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Hi Klaus,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Thank you for your suggestions. </div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
I checked my EOS file <i>which I have attached here</i>. The data (<b><i>species #2</i></b>) looks just fine but I am still getting the same error right during driver initialization. I have tried reducing the time step and tried to tune couple more runtime
params but the error persists. It's just hard to know at this point what's causing this error. </div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
I would really appreciate your help,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<br>
</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Thanks,</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Nitish</div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> flash-users-bounces@flash.uchicago.edu <flash-users-bounces@flash.uchicago.edu> on behalf of Klaus Weide <klaus@flash.uchicago.edu><br>
<b>Sent:</b> Thursday, September 17, 2020 2:34 PM<br>
<b>To:</b> flash-users@flash.uchicago.edu <flash-users@flash.uchicago.edu><br>
<b>Subject:</b> [EXT] Re: [FLASH-USERS] Computed hydro dt is not positive</font>
<div> </div>
</div>
<div class="BodyFragment"><font size="2"><span style="font-size:11pt;">
<div class="PlainText">On Thu, 17 Sep 2020, Acharya, Nitish wrote:<br>
<br>
> I have been applying the analytical ideal gas EOS to simulate my <br>
> material for a LaserSlab based problem. Recently, instead of using an <br>
> equation, I used the same ideal gas model and built a tabulated IONMIX <br>
> EOS. However, as I use the tabulated EOS for the simulation, I've been <br>
> repeatedly getting an error during driver initialization<br>
<br>
FLASH should generate a file EOS_printout_tables.txt when it starts up.<br>
The first thing I would do is carefully check that file: <br>
<br>
* Do all the data make sense?<br>
* Are all values positive that physically should be positive<br>
(energies, pressures)? <br>
* Are all pressures and energies monotonically increasing with increasing <br>
temperature?<br>
* You should have a nonzero Z(T,density) function (shown under the <br>
heading IONIZATION DATA in the printout file); it should be constant<br>
if your EOS table file is meant to exactly represent a (3T) Gamma Eos.<br>
<br>
Klaus<br>
</div>
</span></font></div>
</body>
</html>