Pore-Scale Wetting Process of Capillary-Driven Flow in Unsaturated Porous Media under Micro- and Earth-Gravities
Round 1
Reviewer 1 Report
Comments for author File: Comments.pdf
Author Response
Please see the attachment.
Author Response File: Author Response.docx
Reviewer 2 Report
water-1699715
Pore-scale wetting process of capillary-driven flow in unsaturated porous media under micro-and Earth-gravities
The manuscript provides an experimental study of water/air flows in packed beds in microgravity conditions and compares it with that under full gravity. The dynamic of the advancing of the wetting front is analyzed by measuring of wetting of individual particles and of the variations of the water flow rates. No significant differences between process under various gravity conditions have been observed.
The subject of the study presents an interest for practical applications and contributes to the advancement of the research domain of multiphase flows in porous media. It is well organized and written and I have no any critical observation. For my opinion, it can be published in Water.
Author Response
We would like to thank you very much for reviewing the manuscript and for your feedback. The editor offered us to provide professional English editing to this manuscript after the acceptance. Thus, English language and style will be brushed up. We greatly appreciate again for taking time for reviewing our manuscript.
Round 2
Reviewer 1 Report
Objective 1 : I feel the key word "to observe" is inappropriate ( not measurable), please use an appropriate word here.
The language/grammar need to be further improved. Few examples are as follows:
Figure 7 (caption): The higher frequency meant the wetting front stopped there longer> The higher frequency implies...
L399: Figure 9c and 9d written before figure 9a and 9b, rephrase to get the correct order for the reader.
L450: The backward movement took negative flux densities in the definition> awkward sentence. please revise.
L569-570:unsaturated porous media may have gravity dependency when porosity is large enough to allow particles to move. From the wet part analysis...> need to be revised
Author Response
Please see the attachment.
Author Response File: Author Response.docx