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Small values of the Prandtl number, Pr ≪ 1, means the thermal diffusivity dominates. Whereas with large values, Pr ≫ 1 , the momentum diffusivity dominates the behavior. For example, the listed value for liquid mercury indicates that the heat conduction is more significant compared to convection , so thermal diffusivity is dominant.
Percentile ranks (PR) for a distribution of 10 scores. In statistics, the percentile rank (PR) ... and N is the number of scores in the distribution.
The simplest model for Pr t is the Reynolds analogy, which yields a turbulent Prandtl number of 1. From experimental data, Pr t has an average value of 0.85, but ranges from 0.7 to 0.9 depending on the Prandtl number of the fluid in question.
In the context of the thermal fluids, the thermal Péclet number is equivalent to the product of the Reynolds number and the Prandtl number (Re × Pr). The Péclet number is defined as: Plan view: For P e L → 0 {\displaystyle Pe_{L}\rightarrow 0} , advection is negligible, and diffusion dominates mass transport.
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To calculate the recall for a given class, we divide the number of true positives by the prevalence of this class (number of times that the class occurs in the data sample). The class-wise precision and recall values can then be combined into an overall multi-class evaluation score, e.g., using the macro F1 metric. [21]
Re – real part of a complex number. [2] (Also written.) resp – respectively. RHS – right-hand side of an equation. rk – rank. (Also written as rank.) RMS, rms – root mean square. rng – non-unital ring. rot – rotor of a vector field. (Also written as curl.) rowsp – row space of a matrix. RTP – required to prove.
A player whose rating is 100 points greater than their opponent's is expected to score 64%; if the difference is 200 points, then the expected score for the stronger player is 76%. [ 2 ] A player's Elo rating is a number that may change depending on the outcome of rated games played.