ABSTRACT
At the occasion of the 25th year celebration of the
Technische Hochschule Danzig-Langfur, July 18-20,
1929, Professor Dr. Ernst Schmidt in his presentation,
probably for the first time, introduced the dimensionless
group k/v which later came to be the Schmidt number.
His presentation was later published in the journal
Gesundheits-Ingenieur.[1] At the beginning, this dimen-
sionless group was, especially in Germany, referred to as
the Prandtl number for mass transfer and was denominated
Pr 0. In Germany, this term was used for several years, and for instance as late as 1956 O. Krischer used the
term in his book Die wissentschaftlichen Grundlagen der
Trocknungstechnik. However, already in 1933 at the
Round Table Conference of Chicago Meeting, American
Institute of Chemical Engineers proposed the name
Schmidt Number.
