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<div name="messageBodySection" style="font-size: 14px; font-family: -apple-system, BlinkMacSystemFont, sans-serif;">Hi all,
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<div>I’m using the Ionize unit in a 2D Sedov simulation with FLASH4.3. From the log file, <b>the variable “h “ is fully ionized</b> with “positive" number of 1 and “negative†0. In the ionizing file “nei.F90†(line 86--87) under “source/physics/sourceTerms/Ionize/IonizeMain/Neiâ€, hydrogen and electron mass fraction remain unchanged. But the phase plot shows that they are changing with temperature (or density):</div>
<div><img src="cid:B16E108415694157BC52D4D76EDD737C" data-originalsrc="file:///Users/gaoyuan/Documents/academic/FLASH/mmsnr_sedov_redo/scattered_h.png" /><br /></div>
<div>I have tested that other element (Oxygen) changes little with temperature, and doesn’t have a consistence with “h “ or “elecâ€.</div>
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<div>I think there are two possibilities:</div>
<div>1. “h “ and “elec†are <b>not normalised</b> after a MHD process (advection)</div>
<div>2. “h “ is <b>not fully ionized</b> hydrogen </div>
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<div>Do you know where is the problem with the mass fraction?</div>
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<div>Another relating question is that in log file, the “total†number (atomic mass) for “h " is 0.904 which is strange to me. And in “Simulation_initSpecies.F90†under "source/Simulation/SimulationComposition/Ionize/“, the “h “ atomic mass is set to “ave_hmass†that changes if not all the elements are selected. They are different with each other, but seems to be stored both in “ms_Arrayâ€. Do you know what’s the meaning for the “ave_hmass†and which value is used in the simulation?</div>
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<div>Thanks,</div>
<div>Gao-Yuan</div>
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<span style="font-family: Helvetica; font-size: 12px;">Gao-Yuan ZHANG</span><br style="font-family: Helvetica; font-size: 12px;" />
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