Direct measurement of yield stress of discrete materials
  We present a novel computational method for direct measurement of yield stress of discrete materials. The method is well-suited for the measurement of jamming phase diagram of a wide range of discrete particle systems such as granular materials, foams, and colloids. We further successfully apply the method to evaluate the jamming phase diagram of wet granular material in order to demonstrates the applicability of the model. 
S. H. Ebrahimnazhad Rahbari, J. Vollmer, S. Herminghaus, M. Brinkmann
cond-mat.soft