Waxy crude oils are, at low temperatures, highly non-Newtonian fluids. The crystallization of wax seems to be the cause of their non-Newtonian behavior. Moreover, the flow properties show time-dependence indicating an evolution of the structure with continued shear (termed 'thixotropy').In this paper, on the basis of the experimental data, we have developed a physical model which tries to describe the low temperature behavior of waxy crudes in laboratory experimental loops. The correspondent mathematical problem has been investigated performing a quasisteady approximation which we have shown to be physically consistent. Waxy crude oils are, at low temperatures, highly non-Newtonian fluids. The crystallization of wax seems to be the cause of their non-Newtonian behavior. Moreover, the flow properties show time-dependence indicating an evolution of the structure with continued shear (termed `thixotropy'). In this paper, on the basis of the experimental data, we have developed a physical model which tries to describe the low temperature behavior of waxy crudes in laboratory experimental loops. The correspondent mathematical problem has been investigated performing a quasisteady approximation which we have shown to be physically consistent.
FLOW CHARACTERISTICS OF WAXY CRUDE OILS IN LABORATORY EXPERIMENTAL LOOPS / A. FASANO. - In: MATHEMATICAL AND COMPUTER MODELLING. - ISSN 0895-7177. - STAMPA. - 25:(1997), pp. 75-86. [10.1016/S0895-7177(97)00031-9]
FLOW CHARACTERISTICS OF WAXY CRUDE OILS IN LABORATORY EXPERIMENTAL LOOPS
FASANO, ANTONIO
1997
Abstract
Waxy crude oils are, at low temperatures, highly non-Newtonian fluids. The crystallization of wax seems to be the cause of their non-Newtonian behavior. Moreover, the flow properties show time-dependence indicating an evolution of the structure with continued shear (termed 'thixotropy').In this paper, on the basis of the experimental data, we have developed a physical model which tries to describe the low temperature behavior of waxy crudes in laboratory experimental loops. The correspondent mathematical problem has been investigated performing a quasisteady approximation which we have shown to be physically consistent. Waxy crude oils are, at low temperatures, highly non-Newtonian fluids. The crystallization of wax seems to be the cause of their non-Newtonian behavior. Moreover, the flow properties show time-dependence indicating an evolution of the structure with continued shear (termed `thixotropy'). In this paper, on the basis of the experimental data, we have developed a physical model which tries to describe the low temperature behavior of waxy crudes in laboratory experimental loops. The correspondent mathematical problem has been investigated performing a quasisteady approximation which we have shown to be physically consistent.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.