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Old   April 10, 2003, 07:13
Default spray injection.
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Hi~ I have problems. First one is that I don't know void fraction in spray injection problem.

I have got the warning message when calculation started.

*** WARNING #016 *** VOID FRACTION OF CELL 123966 IS TOO LARGE - .451. IT IS SET TO - .400

what is void fraction? And how I control void fraction value??

Second problem is below message that I got the message when calculation start.

1527-097 A READ statment using decimal base input found the invalid digit '*' in the input file. the program will recover by assuming a zero in its place.

What is wrong with me?? I dont understand... Problems are very serious to me..

Please help me!!

Thank all~
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Old   May 5, 2003, 03:12
Default Re: spray injection.
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void fraction is the ratio of the cell volume occupied by the spray to the total cell volume. For Langrangian computations, this should be as small as possible, in Star-CD, a limit of 0.4 is set. So, if your void fraction is .45 Star-CD sets the computed value to 0.4. I don't know anything about the second warning message.
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Old   May 6, 2003, 01:06
Default Re: spray injection.
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The second message says, that in your .prob-file you have due to certain reasons '*' and not a number as expected.

try this: in prostar set the number of iterations to, lets say, 999999999999 (a very high number) and do a problem-write. when you then look at the file, you will see a '*' instead of 999999999999. the warning message now says, that star ignores the '*' and uses 0 as a numerical value.

hope this helps,

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