Floating Point Error Ansys Cfx
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Floating Point Exception Fluent
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Floating Point Exception In C
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is unclear or undesirable. Exceptions can be ignored, in which
Floating Point Exception C++
case some default action is taken, such as floating point exception 8 returning a special value. When trapping is enabled for an exception, a error is
Floating Point Exception (core Dumped)
signalled whenever that exception occurs. These are the possible floating point exceptions: :underflow This exception occurs when the result of an http://www.cfd-online.com/Wiki/Ansys_FAQ operation is too small to be represented as a normalized float in its format. If trapping is enabled, the floating-point-underflow condition is signalled. Otherwise, the operation results in a denormalized float or zero. :overflow This exception occurs when the result of an operation is http://www.umiacs.umd.edu/~resnik/ling645_sp2002/cmu_manual/node19.html too large to be represented as a float in its format. If trapping is enabled, the floating-point-overflow exception is signalled. Otherwise, the operation results in the appropriate infinity. :inexact This exception occurs when the result of a floating point operation is not exact, i.e. the result was rounded. If trapping is enabled, the extensions:floating-point-inexact condition is signalled. Otherwise, the rounded result is returned. :invalid This exception occurs when the result of an operation is ill-defined, such as (/ 0.0 0.0). If trapping is enabled, the extensions:floating-point-invalid condition is signalled. Otherwise, a quiet NaN is returned. :divide-by-zero This exception occurs when a float is divided by zero. If trapping is enabled, the divide-by-zero condition is signalled. Otherwise, the appropriate infinity is returned. Raymond Toy Mon Jul 14 09:11:27 EDT 1997
STEP = 6 SIMULATION TIME = 3.00E+11 CPU SECONDS = 1.05E+02 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Location | Linear Solution | +----------+------+---------+---------+----------+-------------------+ | https://www.sharcnet.ca/Software/Ansys/16.2.3/en-us/help/cfx_mod/i1324071.html U - Mom | 1.36 | 3.7E-02 | 3.5E-01 | 1 | NaN * | | V - Mom | 1.37 | 3.8E-02 | 3.5E-01 | 1 | NaN * | | W - Mom | 0.75 | 1.2E-01 | 1.2E+00 | 26 | NaN * | | P - Mass | 1.74 | 2.0E-02 | floating point 6.9E-01 | 1248 | 8.3 Nan * | +----------+------+---------+---------+----------+------------------- +--------------------------------------------------------------------+ | ERROR #004100018 has occurred in subroutine FINMES. | | Message: | | Fatal overflow in linear solver. | +--------------------------------------------------------------------+ After which the CFX-Solver terminates. The "*" means that there has been a floating point exception in the linear solver, usually a floating point overflow.Sometimes a linear floating point exception solver failure can be less dramatic, such as ====================================================================== TIME STEP = 2 SIMULATION TIME = 1.00E+11 CPU SECONDS = 2.52E+01 ---------------------------------------------------------------------- | Equation | Rate | RMS Res | Max Res | Location | Linear Solution | +----------+------+---------+---------+----------+-------------------+ | U - Mom | 0.00 | 3.7E-05 | 4.9E-04 | 48 | 2.6E+01 F | | V - Mom | 0.00 | 3.7E-05 | 4.9E-04 | 38 | 2.6E+01 F | | W - Mom | 0.00 | 2.8E-04 | 7.1E-03 | 37 | 8.4E+01 F | | P - Mass | 0.00 | 1.3E-07 | 3.8E-06 | 37 | 8.3 1.1E+02 F | +----------+------+---------+---------+----------+-------------------+ | H-Energy | 0.00 | 2.6E-02 | 1.9E-01 | 748 | 10.2 5.0E-04 OK | +----------+------+---------+---------+----------+-------------------+ | K-TurbKE | 0.00 | 0.0E+00 | 5.9E-34 | 1200 | 5.6 0.0E+00 OK | +----------+------+---------+---------+----------+-------------------+ | E-Diss.K | 0.00 | 0.0E+00 | 5.7E-34 | 1200 | 5.6 0.0E+00 OK | +----------+------+---------+---------+----------+-------------------+ This time the CFX-Solver continues with mixed results (that is, sometimes it will recover and conve