Height of fluid and pressure

Question

It’s a well known fact that pressure at bottom of the contain depends on height of the fluid column above it.

If I add a ultra thin capillary tube as a fifth tube, then height of the water column rises due to adhesive force of water.

What happens to pressure at the bottom of the container?

Theoretically, it should increase.

MarianD · Accepted Answer · 2019-04-17 19:16:32Z

3

No, it will not increase, because the adhesive force eliminates the increased gravitational force of water in the column.

answered Apr 17 at 19:16

MarianD

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$\begingroup$ How could I have missed that , anyways could please add more details about how to quantify the scenario. $\endgroup$ – Chemist Apr 17 at 19:21
$\begingroup$ @Chemist The additional information is obtained by a force balance on the column of water. Include the pressure force (downward), the surface tension force (upward for wetting contact angles and downward for non-wetting), and gravity force. The net force at the bottom is the same regardless of the contact angle. $\endgroup$ – Jeffrey J Weimer Apr 17 at 22:26
$\begingroup$ Should I consider whole of the column of liquid or just the upper part? $\endgroup$ – Chemist Apr 18 at 15:10

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