Spatio-temporal deviations in fluid flow resulting from particle-fluid interactions
Spatio-temporal deviations in fluid flow resulting from particle-fluid interactions
复制标题
DOI：
10.1088/1742-5468/2011/02/p02038
复制
发表时间：
2011-02-01
影响因子：
2.4
通讯作者：
Monterola, Christopher
中科院分区：
文献类型：
--
作者：
Felix Valenzuela, Jesus;Monterola, Christopher
我们描述了悬浮粒子的存在对进行对流的流体的影响，并发现它会导致流体速度和温度的偏差。两个场剖面的时空偏差在流体的几个明确定义的区域是持久的。我们发现这些变化是稳健的，并在不同的温度分布中表现出来，尽管偏差的强度取决于悬浮液达到稳定状态所需的时间。颗粒的存在主要影响是减弱流体的对流强度和热通量，并改变对流的空间特征。结果量化了悬浮液中粒子的物理存在和运动对其流动动力学的影响程度，这在大多数建模协议中通常被忽略。
We characterize the influence of the presence of suspended particles on a fluid undergoing convection and find that it leads to deviations in both the fluid speed and temperature. The spatio-temporal deviations of the profiles for both fields are persistent in several well-defined regions of the fluid. We find these variations to be robust and to be exhibited by different temperature profiles, although the strength of the deviations depends on the amount of time required by the suspension to reach a steady state. The primary effect of the presence of the particles is to weaken the fluid convective strength and heat flux, as well as to change the convection's spatial characteristics. The results quantify the degree to which the physical presence and motion of particles in a suspension affect its flow dynamics, a case that is typically neglected in most modeling protocols.