Nombre d'Ellis

El nombre d'Ellis és un nombre adimensional utilitzat en la mecànica de fluids per caracteritzar el flux de líquids no newtonians.[1][2]

Aquest nombre porta el nom del químic estatunidenc Samuel Benjamin Ellis.

Es defineix de la següent manera:

amb :

  • = viscositat dinàmica sense tall.
  • = velocitat del líquid.
  • = tensió tallant quan .
  • = longitud característica (radi o diàmetre del tub).

Referències

  1. Massey, Bernard Stanford. Measures in science and engineering: their expression, relation and interpretation (en anglès). Ellis Horwood Limited, 1986. ISBN 0853126070. 
  2. Hall, Carl W. Laws and Models: Science, Engineering and Technology (en anglès). Boca Raton: CRC Press, 2000. 

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