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<div>dear klaus,</div><div>thanks for your reply. I solved this problem by changing the cfl and the solver theme. I will also try your suggestions. </div><div><br></div><div class="NETEASEMAILMASTERLOCALSIGNATURE"><div id="imail_signature">best wishes
<br>-------------
<br>Fang Li</div></div>
<div class="borderFixWidth iMailDoNotReScale" style="background-color:#f2f2f2;color:black;padding-top:6px;padding-bottom:6px;border-radius:3px;-moz-border-radius:3px;-webkit-border-radius:3px;margin-top:45px;margin-bottom:20px;"><div style="font-size:14px;line-height:1.5;word-break:break-all;margin-left:10px;margin-right:10px">On 09/29/2016 01:36, <a style="text-decoration:none;color:#2a97ff;" href="mailto:klaus@flash.uchicago.edu">Klaus Weide</a> wrote:</div></div><blockquote id="ntes-iosmail-quote" style="margin:0">On Tue, 27 Sep 2016, Fang Li wrote:
<br>
<br>I'm using FLASH to simulate the HEDP problem. I'm using two materials (Al+CH) in the simulation.
<br>The job aborted with the prompt "Newton-Raphson failed in multitemp, multitype Eos.F90" as seen below.
<br>I have succeeded in other simulation using two material. I just changed the target shape.
<br>Can anyone help me to figure out what's the problem? Thanks very much.
<br>
<br>Dear Fang Li,
<br>
<br>It is hard to say much without additional information. There could be
<br>a variety of reasons that could cause this error. Running your code
<br>in a debugger may be ncessary to narrow down the problem.
<br>
<br>As a first step, you should write a checkpoint or plotfile immediately
<br>before this problem occurs, and check whether all variables show
<br>reasonable behavior at that point.
<br>
<br>Changing the following runtime parameters MAY help:
<br>
<br> D eos_tolerance tolerance for the Newton-Raphson iterations
<br> PARAMETER eos_tolerance REAL
<br>
<br> D eos_maxNewton maximum number of Newton-Raphson iterations to try.
<br> PARAMETER eos_maxNewton INTEGER
<br>
<br> PARAMETER eos_maxFactorUp REAL
<br> PARAMETER eos_maxFactorDown REAL
<br>
<br>
<br>I noticed that in your message, your species mass fractions do not exactly add up to one:
<br>
<br> mass fractions:
<br> cham 9.934238787156949E-01
<br> poly 6.578875272006729E-03
<br> targ 1.000000000000000E-99
<br>
<br>I get a sum of about 1.00000275; the difference from 1 is small but I
<br>would expect better agreement. Is this difference already present in
<br>your initial conditions? If not, maybe setting irenorm=1 helps?
<br>
<br>
<br>
<br>Klaus</blockquote>
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