concentration fields measurement 浓度场测量
3-d concentration fields 三维浓度场
DPIV(Digital Particle Image Velocimetry) technology was used to observe velocity fields and concentration fields of powder streams.
首次结合数字粒子图像测速技术(DPIV)设计了对粉末流束的速度场和浓度场的试验方案，并实际检测了在不同工作状态下的粉末流束的速度场和浓度场。
参考来源 - 基于激光再制造的三维同轴送粉工作头研究The flow and concentration fields in a static mixer were numerically simulated by computational fluid dynamics(CFD) software package
本文使用计算流体力学（CFD）软件包（FLUENT 6.0）数值模拟了静态混合器内的流场与浓度场。
参考来源 - 三元混合液混合单元的优选与研制·2,447,543篇论文数据，部分数据来源于NoteExpress
This paper discusses the flow velocity and concentration fields in the cyclone separator.
本文论述了旋风分离器的速度场和浓度场。
Unsteady flow and concentration fields in the liquid phase of a gas-liquid contacting system were simulated to show the natural convection by utilizing the finite-element CFD method.
并通过吸收传质流体CFD模型，应用有限元方法对气液吸收过程中出现的自然对流发生过程进行了数值计算，得到了液相自然对流发生时的非稳态流场分布和浓度分布信息。
The model is applied to simulate the flow and concentration fields in the north branch of Changjiang estuary after the building of Chonghai Road Bridge.
模型应用于长江口北支崇海公路大桥修建后的流场浓度场的数值模拟。
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