Número de Deborah

O número de Deborah é um número adimensional utilizado em reologia. Caracteriza a fluidez de um material sob condições específicas de fluxo. O número foi originalmente proposto por Markus Reiner, professor da Technion, inspirado em um versículo bíblico da juíza Débora.[1]

Definição

O número de Deborah é definido pela razão entre o tempo de relaxamento das tensões e o tempo característico da duração do experimento (ou da simulação computacional). Ela dá a relação do escoamento do material no tempo de observação.

onde tc é o tempo de relaxamento e tp é a escala do tempo de observação.

Referências

  1. Poole, R J (2012). «The Deborah and Weissenberg numbers» (PDF). Rheology Bulletin. 53 (2): 32–39 


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