Hello,
It could be due to various reasons. Basically floating point error occurs when you ask Ansys Fluent to perform an operation which is impossible, like, divide a number by zero.
Probable reasons could be 1) Improper mesh 2) You have defined a value close to zero. You can check the reference values for this.
To assist you better, could you provide more details of your simulation?
Regards,
Rahul
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