Questions tagged [capillary-action]
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163 questions
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Leveraging mercury's depression in a capillary for a siphon (and potentially a capillary engine!!)?
It's likely a familiar notion that water rises in a capillary.
When it comes to mercury however, it appears there is a drop. From what I've looked up, it is due to strong cohesion between mercury ...
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How do we know in capillary rise fluid eventually stops rising?
The proofs i have seen of capillary rise formula generally assume the fluid comes to eventually some height and stop and and sets acceleration to be $0$ to get that height. However do we know such a ...
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Adhesive Force between Sphere and Plane
I am attempting to derive the capillary adhesive force between a rigid solid sphere of radius $a$ and a flat horizontal substrate, mediated by a small volume of liquid forming a capillary bridge. I ...
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Capillary rise clarification on pressure
NOTE; IGNORE THE OIL IN THE IMAGE IT IS AIR
pls link any wiki/related sites that use the method of excess pressure inside a bubble to find a rise in height
in this method of deriving the capillary ...
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Why does the film method require an approximation but the force method doesn't in computing the capillary rise in this arrangement?
In the arrangement shown below, if the surface tension of the given liquid is $T$, its density is $\rho$, angle of contact $\theta=0^\circ$ and $R_2-R_1 \ll R_1$ and $R_2$, evaluate $h$.
$\textbf{...
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No capillary action implying zero surface tension
From HC Verma, Concepts of Physics, Chapter 14, Objective II, Question 6
When a capillary tube is dipped into a liquid, the liquid neither rises nor falls in the capillary.
(a) The surface tension of ...
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Capillary action question
I have noticed something odd. I use a straw to drink. When I drink Sprite, the straw often drips Sprite on my desk. No other beverages drip. It doesn't seem to be related to carbonation, since ...
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Why does it seem like Jurin's Law contradict how capillary action works?
Okay, so Jurin's Law relates surface tension, $\gamma$, with the rise height of the water, $h$:
$$h = \frac{2 \gamma \cos \theta}{\rho rg}.$$
This means that, as surface tension increase, $h$ will ...
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Why don't we find capillary condensation all around us?
Capillary condensation is a phenomenon where condensation happens even in an unsaturated vapour provided that the radius of curvature of the condensate surface is sufficiently small, for example in ...
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Is the low pressure behind a (wetting) fluid meniscus local or global when the meniscus is pinned inside a filled capillary closed at one end?
I have not been able to resolve the following question, that has arisen in my experimental setup, despite extensive research. The many sources indirectly addressing a similar configuration seem ...
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Interface excess free energy using spherical harmonics
I am a bit struggling to calculate a quantity involving spherical harmonics $Y_{lm}(\theta,\varphi)$. We parameterize as surface in spherical coordinates as:
\begin{equation}
\xi(\theta,\varphi) = R \...
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How to calculate pressure necessary to push air bubble out of capillary [closed]
An air bubble is kept by surface tension at the bottom of a capillary. The capillary is sealed at the bottom, where the air bubble sits.
How to calculate the pressure necessary to push the air bubble ...
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Best mesh design for a tea strainer [closed]
I'm currently designing a closed tea strainer / egg made of stainless steel and testing a prototype made of polycarbonate plastic. The problem I'm facing likely has to do with the capillary effect - ...
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Regarding angle of contact and capillary tube of insufficient length
It is written in my book that when a capillary tube is of insufficient length, the liquid does not overflow and the shape of the liquid meniscus changes, but the angle of contact remains the same. I ...
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Capillary action strength questions [closed]
I've been studying capillary action, and I've drawn some conclusions about the behavior which surprised me, and I want to know if I'm understanding it correctly.
According to Jurin's law, the height ...
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