Abstract
Flow behavior of a suspension of yeast cells, Saccharomyces cerevisiae, was analyzed to account for the effects of volume fraction and NaCl addition on apparent viscosity of the concentrated suspension. The suspension exhibited a dilatant flow characteristic. The addition of NaCl to the suspension decreased the cell volume fraction considerably. The relationship between apparent viscosity and cell volume fraction of the yeast suspension in both water and salt solution could be expressed by a semi-theoretical equation. Non-Newtonian flow of the concentrated suspension of yeast cells was simulated by this equation, provided a correction factor to account for collisions between individual particles was introduced.
