中文摘要：

主要通过数值模拟研究运动细胞在直通道中对周围浓度梯度场的影响,及对流传质Peclet数、细胞运动速度、细胞运动方向以及细胞大小对细胞周围浓度场的影响.研究发现,细胞在匀速运动一定距离后其周围的最大浓度差的大小和方向与相同位置静止情形下的值的偏差是一个常数,且此常数与传质Peclet数、细胞运动速度及方向、细胞直径等相关.该结论对细胞趋化效应的进一步量化研究具有重要意义.

英文摘要：

The microfluidic technology can produce temporal and spatial stable concentration gradient,which benefits quantitative investigation of living cell chemotaxis. To date, the study of chemotactic effect normally neglected the cell volume and the impact of cell motion. In this paper, the impact of a moving sphere cell on the concentration field was investigated by changing the Peclet number, the velocity of cell and the direction of movements. Results show that the deviation of the maximum concentration difference around a moving cell and a stationary cell at the same spot is close to a constant after a certain time. The maximum concentration difference around a moving cell can be replaced by that of a stationary cell with corrections. This conclusion is valuable to further quantitative chemotactic research.