Dimensionless Croups

Sometimes the dimensionless group is describing heat transfer and sometimes mass transfer. For example, the Biot number and the Peclet number have forms for both mass and heat transfer. 

Some terms, such as reaction rate and gaseous mass transfer coefficient, can be expressed in different units. For a dimensionless number to be dimensionless, the units used for the terms must ensure that that happens. 

Dimensionless number Word definition Equation Range So what  

Arrhenius no. Arr relative activation E/R T gas solid Reactions Use to tell 

Rules of Thumb in Engineering Practice. Donald R. Woods Copyright 2007 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 978-3-527-31220-7 

---

Common Dimensionless Croups and Their Relationships SOI a particular velocity state for plane x = 0 ... 

Particularization of the Relationship of Dimensionless Croups Using Experimental Data 519... 

---