Comment on "Microflow in a rhythmically expanding alveolar chip with dynamic similarity" by H. Lv, J. Dong, Y. Qiu, Y. Yang and Y. Zhu, Lab Chip, 2020, 20, 2394.

This comment on an article that appeared in this journal (H. Lv, J. Dong, Y. Qiu, Y. Yang and Y. Zhu, Lab Chip, 2020, 20, 2394-2402) highlights some important inconsistencies between the authors' experimental measurements and their numerical simulations.