Showing papers by "Spiros V. Paras published in 2001"
TL;DR: The kinetics of growth and xanthan production by Xanthomonas campestris ATCC 1395 in batch culture were studied in a laboratory fermenter without pH control and the chemical structure ofxanthan was influenced by agitation, as the pyruvate content increased with increasing stirrer speeds.
99 citations
TL;DR: In this article, flooding in a vertical rectangular channel with 5 and 10 mm gap between its main parallel plates is reported. But the critical flooding velocity is nearly independent of liquid flow rate above film Reynolds number approximately 500.
34 citations
TL;DR: In this article, a commercial CFD code (CFX 1 ) was used for the calculation of the velocity proe les of both phases and the distribution of the shear stresses, i.e. liquid-towall, interfacial.
Abstract: Acomputational e uid dynamics code was employed to obtain detailed characteristics of horizontal wavy stratie ed two-phase eow for two geometries (pipe and channel). By treating the gas and the liquid phases separately, the calculations are performed utilizing information concerning the pressure drop and the liquid e lm thickness, which can either be obtained experimentally or calculated using one of the available correlations. The basic convergence criterion is the continuity of the time-averaged interfacial velocity and shear stress between the two phases. A commercial CFD code (CFX 1 ) was used for the calculation of the velocity proe les of both phases and the distribution of the shear stresses, i.e. liquid-towall, interfacial. The calculated values are found to be in good agreement with those obtained experimentally.
24 citations