Forces acting on body placed in meniscus

In summary, the conversation discusses the phenomenon of meniscus in a capillary and how it changes from concave to convex when more water is added. It also addresses the forces acting on a body placed on the water surface in the center of the meniscus, and which meniscus can hold a heavier body. The question of whether the capillary diameter affects this is also raised, along with whether pressure or temperature can change the meniscus and if anything else can affect it besides interfacial energy.
  • #1
muldi
1
0
I have a question regarding forces in meniscus.

Lets assume we have capillary 1cm in diameter. We pour some water into the capillary.
We will observe concave meniscus. If we add some water (so water level exceed the height of the capillary) we will observe convex meniscus.

Not let's assume we place a body (not heavy one) on the water surface in the center of the meniscus. What forces (strength and direction) will be acting on our body in both cases?

Which meniscus can hold heavier body on the water surface?

Will it change a lot with capillary diameter?

I hope my question is clear.
 
Physics news on Phys.org
  • #2
interfacial energy is not related to canthotaxis; the 'floating' body knows nothing of the contact angle.
 
  • #3
Does pressure or temperature change the meniscus of water?
 
  • #4
Can anything change meniscus?
 

Related to Forces acting on body placed in meniscus

1. What is a meniscus?

A meniscus is the curved surface that forms at the top of a liquid when it is in a container. It is caused by surface tension, which is the cohesive force between liquid molecules that creates a surface film.

2. What forces act on a body placed in a meniscus?

There are three main forces that act on a body placed in a meniscus: gravity, surface tension, and buoyancy. Gravity pulls the body downward, surface tension pulls the body inward towards the center of the meniscus, and buoyancy pushes the body upward due to the displacement of liquid by the body.

3. How does the shape of the meniscus change with different bodies placed in it?

The shape of the meniscus will change based on the size and shape of the body placed in it. For example, a larger body will create a larger depression in the meniscus, while a smaller body will create a smaller depression. The shape of the meniscus will also be affected by the surface tension and buoyancy forces acting on the body.

4. How does the density of the body affect the forces acting on it in a meniscus?

The density of the body will affect the buoyancy force acting on it in a meniscus. A less dense body will experience a greater buoyant force, causing it to float higher in the meniscus, while a more dense body will experience a smaller buoyant force and sink lower in the meniscus. The other forces, gravity and surface tension, will not be affected by the density of the body.

5. Can the forces acting on a body in a meniscus be measured?

Yes, the forces acting on a body in a meniscus can be measured using various methods such as a force sensor or a balance scale. These measurements can give insight into the surface tension and buoyancy forces present in the meniscus and can also aid in determining the density of the body.

Similar threads

Measuring Height of Meniscus in Capillary Action
    • Introductory Physics Homework Help
Replies
1
Views
3K
Capillary Action Homework: ΔP, γ, R1, R2
    • Introductory Physics Homework Help
Replies
5
Views
1K
Capillary action with respect to "wicking beds"
    • Other Physics Topics
Replies
2
Views
3K
Capillary Tube and Surface Tension
    • Introductory Physics Homework Help
Replies
7
Views
12K
I Calculating Water Pool Depth: Factors to Consider in Fluid Dynamics
    • Mechanics
Replies
13
Views
789
Surface element meniscus - free body diagram
    • Mechanics
Replies
24
Views
9K
How would your body change if you were in a 4D space?
    • Science Fiction and Fantasy Media
Replies
0
Views
1K
Question about irradiance from a UV lamp
    • General Engineering
Replies
6
Views
2K
B Why is the reaction force different when passing through different materials?
    • Other Physics Topics
Replies
7
Views
1K
I Comparison of tidal forces acting on the Moon vs Enceladus
    • Other Physics Topics
2
Replies
56
Views
5K

Hot Threads

Recent Insights

Back
Top