Name: finding the force on curved fluid surfaces
Uploaded: 2025-02-13T15:43:11.000Z
Duration: 1 min 4 s
Channel: JoVE

Considere una piscina con un líquido de un peso específico conocido que tiene una superficie curva en la parte inferior.
Si el volumen alrededor de la superficie curva se aísla con un plano horizontal y vertical a lo largo de una unidad de longitud, la superficie del plano horizontal y la superficie del plano vertical experimentarán fuerzas perpendiculares a sus planos debido al fluido.
El peso propio del fluido en el volumen cerrado es el producto del peso específico del fluido y el volumen del espacio cerrado, actuando a través del centro de gravedad del volumen.
Los componentes de fuerza ejercidos por la superficie curva sobre el fluido, tanto en dirección horizontal como vertical, se pueden expresar a través de las fuerzas desarrolladas en los planos horizontal y vertical, junto con el peso propio del fluido en el volumen aislado.
Finalmente, la fuerza hidrostática que actúa sobre la superficie curva viene dada por la raíz cuadrada de la suma de los cuadrados de los componentes de fuerza ejercidos por la superficie curva de la piscina sobre el fluido.

fuerza de presión hidrostática sobre una superficie curva

La presión hidrostática sobre superficies curvas es un concepto fundamental en la mecánica de fluidos, con numerosas aplicaciones en el ámbito de la ingeniería civil. Cuando un fluido entra en contacto con una superficie curva, como en un depósito, una presa o un tanque de almacenamiento, ejerce una presión que varía en magnitud y dirección a lo largo de la superficie. Para calcular la fuerza hidrostática total que el fluido ejerce sobre una estructura curva, los ingenieros suelen aislar el volumen de fluido adyacente a la superficie y analizar las fuerzas que actúan sobre planos horizontales y verticales imaginarios que atraviesan este volumen. Las fuerzas horizontales y verticales resultan de la presión del fluido que actúa perpendicularmente a cada plano, y sus magnitudes dependen del peso específico y la profundidad del fluido. Además, el peso propio del fluido dentro del volumen aislado actúa a través de su centro de gravedad, lo que contribuye a la fuerza general sobre la superficie curva. Al sumar los cuadrados de los componentes horizontales y verticales y encontrar la raíz cuadrada, los ingenieros pueden calcular la fuerza hidrostática total sobre la superficie curva. Comprender estas fuerzas es esencial para diseñar estructuras hidráulicas seguras y eficientes, como represas, tuberías y recipientes de contención. La evaluación adecuada de la presión hidrostática en superficies curvas ayuda a los ingenieros a garantizar la estabilidad estructural bajo cargas de fluidos variables, lo que contribuye a la durabilidad y seguridad a largo plazo de la infraestructura esencial.

Fuerza de presión hidrostática sobre una superficie curva

Considere una piscina con un líquido de un peso específico conocido que tiene una superficie curva en la parte inferior.
Si el volumen alrededor de la superficie curva es ...

hydrostatic-pressure-force-on-a-curved-surface

Education

Educación

JoVE Core

Civil Engineering

Ingeniería Civil

Unit 1

Unidad 1

Fluid Statics

Estática de Fluidos

KEY TERMS AND CONCEPTS

TÉRMINOS Y CONCEPTOS CLAVE

Hydrostatic Pressure Force on a Curved Surface

finding the force on curved fluid surfaces

Hydrostatic pressure on curved surfaces is an important idea in fluid mechanics. It helps explain how water pushes on curved structures in civil engineering. Examples include reservoirs, dams, and storage tanks. The pressure changes in both size and direction along the curve.

To find the total hydrostatic force on a curved surface, engineers isolate the fluid volume next to that surface. They then study the forces on imaginary horizontal and vertical planes that cut through the volume. The fluid pressure acts perpendicular to each plane. The size of each force depends on the fluid’s specific weight and depth.

The weight of the fluid inside the isolated volume also matters. This self-weight acts through the volume’s center of gravity. Engineers combine the horizontal and vertical force components to get the total hydrostatic force. They do this by squaring the two components, adding them, and taking the square root.

This method is useful for designing safe hydraulic structures. It supports the analysis of dams, pipelines, and containment vessels. Accurate force calculations help these structures stay stable under fluid loads. They also improve long-term durability and safety in essential infrastructure.

Finding the Force on Curved Fluid Surfaces

finding-the-force-on-curved-fluid-surfaces

concept of pressure at a point

Fluid Pressure at One Point

Fluid pressure at one point is the focus of this lesson. It shows that pressure in a fluid is the same in every direction at a single location. This happens because fluid molecules move randomly and collide with nearby molecules in a balanced way. At a given point, the pressure depends on the surrounding fluid molecules. It is affected by depth and density, not by the shape of the container or the way the fluid is oriented. In a fluid at rest, the pressure acts equally in all directions...

basic equation for pressure field

Pressure Balance in a Fluid Element

The pressure field equation describes how forces stay balanced inside a small fluid element. In fluid mechanics, this balance helps explain how pressure changes from one place to another within a fluid. Two main force types act on a fluid segment: surface forces and body forces. Surface forces come from pressure differences across nearby points in the fluid, so they depend on the local pressure gradient, which is the rate of pressure change with position. Body forces are spread through the...

pressure variation in a fluid at rest

Hydrostatic Pressure and Fluid Depth

Hydrostatic pressure describes how pressure changes with depth in a fluid at rest. In a stationary fluid, the fluid acceleration is zero, so the forces inside the fluid balance. That means pressure at a point below the surface depends on depth, not on the container’s shape or size. Only vertical forces affect the pressure change in this situation. These forces come from the weight of the fluid above a point. When pressure is compared at two different levels, the difference in pressure equals...

measurement of fluid pressure

Manometers and Gauges for Fluid Pressure

Fluid pressure is measured with manometers and related gauges. These tools use a liquid column to show pressure differences. The height of the column gives a simple reading of the force the fluid exerts. A basic manometer is the piezometer. It is a vertical tube that is open at the top and filled with the same fluid being measured. When the tube connects to a container, the fluid height in the tube matches the pressure inside that container. For more detailed measurements, the U-tube...

hydrostatic pressure force on a plane surface

hydrostatic-pressure-force-on-a-plane-surface

Hydrostatic Pressure on Submerged Surfaces

Hydrostatic pressure creates force on submerged plane surfaces. The force depends on the fluid pressure and the area of the surface. The way that force acts changes with the surface position. For a horizontal surface, the depth stays the same across the whole area. That means the pressure is uniform. The resultant force equals the pressure at that depth multiplied by the surface area, and it acts through the centroid of the surface. For a vertical surface, pressure increases as depth...

hydrostatic pressure force on a curved surface

Hydrostatic pressure on curved surfaces is an important idea in fluid mechanics. It helps explain how water pushes on curved structures in civil engineering. Examples include reservoirs, dams, and storage tanks. The pressure changes in both size and direction along the curve. To find the total hydrostatic force on a curved surface, engineers isolate the fluid volume next to that surface. They then study the forces on imaginary horizontal and vertical planes that cut through the volume. The...

buoyancy and stability for submerged and floating bodies

buoyancy-and-stability-for-submerged-and-floating-bodies

How Buoyancy Keeps Bodies Stable in Water

Buoyancy and stability explain how submerged and floating bodies behave in a fluid. When a body is fully or partly under water and stays still, the fluid pushes upward on it. That upward push is called the buoyant force. The buoyant force acts through the center of buoyancy. This is the center of the displaced fluid volume. Archimedes’ principle says the buoyant force equals the weight of the fluid displaced by the body. Stability describes whether a body can return to its original position...

design example: application of archimedes' principle

design-example-application-of-archimedes-principle

Floating Block Buoyancy and Center of Buoyancy

Archimedes' principle is used to analyze the buoyant force on a wooden block that floats in seawater. The block has a rectangular section, and its dimensions, specific gravity, and the specific weight of seawater are used in the calculation. This setup shows how floating bodies stay in equilibrium. The first step is to find the weight of the block from its volume and specific gravity. Then Archimedes' principle is applied. The weight of the displaced water must equal the weight of the block.

key terms and concepts

See how hydrostatic pressure on curved surfaces is analyzed using horizontal and vertical force components, fluid weight, and depth in civil engineering examples.

Finding the Force on Curved Fluid Surfaces | JoVE K12

JoVE Core Civil Engineering provides a foundational exploration of essential construction materials in civil engineering, focusing on bricks, stones, steel, wood, and concrete through easy-to-understand animated videos. This collection covers the properties, manufacturing processes, and practical applications of these materials. Additionally, the accompanied science-in-action videos demonstrate the research experiments performed in laboratories.

Finding the Force on Curved Fluid Surfaces

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