Question: Among all publications containing keywords 'Turbulent Fluids', what percentage of them was published in the journal named 'Physics of Fluids'?
SQL: SELECT CAST(SUM(CASE WHEN T1.Keyword = 'Turbulent Fluids' THEN 1 ELSE 0 END) AS REAL) / SUM(CASE WHEN T2.FullName = 'Physics of Fluids' THEN 1 ELSE 0 END) FROM Paper AS T1 INNER JOIN Journal AS T2 ON T1.JournalId = T2.Id