<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi,<div class=""><br class=""></div><div class="">I’m simulating low density plasma (~1.e-4 cm^-3 in number density) with non-equilibrium ionization. The simulation lasts for ~10 timesteps and then aborts with the following epsilon check error:</div><div class=""><br class=""></div><div class="">---------------------------------------</div><div class=""><div class=""> Element I.D.: 10 elsum = 0.99976923704261000 </div><div class=""> error in routine neimn: wrong sum of population fraction</div><div class=""> DRIVER_ABORT: error in routine neimn: wrong sum of pop. fraction</div><div class=""> </div><div class=""> Element I.D.: 10 elsum = 0.99976923704261000 </div><div class=""> error in routine neimn: wrong sum of population fraction</div><div class=""> DRIVER_ABORT: error in routine neimn: wrong sum of pop. fraction</div></div><div class=""><div class="">---------------------------------------</div><div class=""></div></div><div class=""><br class=""></div><div class="">I keep all the parameters in ionization unit as default ones except dneimin = 1.e-6.</div><div class=""><br class=""></div><div class="">Is there a way to fix or circumvent this issue? Say, will it be appropriate to renormalize the fraction in someway?</div><div class=""><br class=""></div><div class="">Thanks in advance for any suggestions!</div><div class=""><br class=""><div apple-content-edited="true" class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Best wishes,</div><div class="">--</div><div class="">Suoqing JI</div><div class="">Ph.D Candidate</div><div class="">Department of Physics</div><div class="">University of California, Santa Barbara</div><div class=""><a href="http://web.physics.ucsb.edu/~suoqing" class="">http://web.physics.ucsb.edu/~suoqing</a></div></div></div></div></div></div></div></div>
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