Overflow Error In Cfx
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Floating Point Exception In C
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Floating Point Exception C++
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is unclear or undesirable. Exceptions can be ignored, in which
Floating Point Exception (core Dumped)
case some default action is taken, such as
Ansys
returning a special value. When trapping is enabled for an exception, a error is 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 | +----------+------+---------+---------+----------+-------------------+ | U - Mom | 1.36 https://www.sharcnet.ca/Software/Ansys/16.2.3/en-us/help/cfx_mod/i1324071.html | 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 | 6.9E-01 | 1248 | 8.3 Nan * | +----------+------+---------+---------+----------+------------------- +--------------------------------------------------------------------+ | ERROR floating point #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 solver failure can be less dramatic, such as ====================================================================== TIME STEP = 2 SIMULATION TIME = 1.00E+11 floating point exception 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 converge, sometimes not). The "F" in the last column means that the linear solver failed to reduce the residuals of the linearized equations (the solution was diverging).When the linear solver fails, it can mean tha