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

ضع في اعتبارك حمام سباحة به سائل بوزن محدد معروف له سطح منحني في الأسفل.
إذا تم عزل الحجم حول السطح المنحني بمستوى أفقي ورأسي على طول وحدة ، فإن سطح المستوى الأفقي وسطح المستوى الرأسي سيختبرون قوى متعامدة مع مستوياتهم بسبب السائل.
الوزن الذاتي للسائل في الحجم المغلق هو نتاج الوزن النوعي للسائل وحجم المساحة المغلقة ، ويعمل من خلال مركز ثقل الحجم.
يمكن التعبير عن مكونات القوة التي يمارسها السطح المنحني على السائل ، في كلا الاتجاهين الأفقي والرأسي ، من خلال القوى التي تم تطويرها على المستويين الأفقي والرأسي ، جنبا إلى جنب مع الوزن الذاتي للسائل في الحجم المعزول.
أخيرا ، يتم إعطاء القوة الهيدروستاتيكية المؤثرة على السطح المنحني من خلال الجذر التربيعي لمجموع مربعات مكونات القوة التي يمارسها السطح المنحني لحمام السباحة على السائل.

قوى الضغط الهيدروستاتيكي على الاسطح المنحنية

<div style="direction:rtl">يعتبر الضغط الهيدروستاتيكي على الأسطح المنحنية مفهومًا أساسيًا في ميكانيكا الموائع ويدخل في العديد من التطبيقات الهندسة المدنية. عندما يكون السائل على اتصال بسطح منحني، كما هو الحال في الخزانات أو السدود أو مستودعات التخزين، فإنه يمارس ضغطًا يختلف في المقدار والاتجاه على طول السطح المنحني. لاستنباط مقدار القوة الهيدروستاتيكية الكلية التي يمارسها السائل على هيكل منحني، يعزل المهندسون عادةً حجم السائل المجاور للسطح المنحني ويحللون القوى المؤثرة على مستويات أفقية ورأسية متخيلة تتقاطع مع هذا الحجم. تنتج القوى الأفقية والرأسية عن ضغط السائل الذي يعمل بشكل عمودي على كل مستوى، وتعتمد مقاديرها على الوزن النوعي للسائل وعمقه. بالإضافة إلى ذلك، تؤثر قوة الوزن الذاتي للسائل داخل الحجم المعزول من خلال مركز ثقل الجاذبية للحجم المعزول، مما يساهم في القوة الكلية على السطح المنحني. يمكن للمهندسين حساب مقدار القوة الهيدروستاتيكية الكلية على السطح المنحني من خلال إيجاد الجذر التربيعي لمجموع مربعات المركبات الأفقية والرأسية للقوى. إن فهم هذه القوى ضروري لتصميم الهياكل الهيدروليكية الآمنة والفعّالة، مثل السدود وخطوط الأنابيب واوعية التخزين. يساعد التقييم الصحيح للضغط الهيدروستاتيكي المؤثر على الأسطح المنحنية المهندسين على ضمان الاستقرار الهيكلي تحت أحمال السوائل المتغيرة، مما يساعد في ضمان متانتها على المدى الطويل وسلامة البنية التحتية الأساسية.</div>

ضع في اعتبارك حمام سباحة به سائل بوزن محدد معروف له سطح منحني في الأسفل.
إذا كان الحجم حول السطح المنحني ...

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

Education

JoVE Core

Civil Engineering

الهندسة المدنية

Unit 1

الوحدة الأولى

Fluid Statics

استاتيكا الموائع

KEY TERMS AND CONCEPTS

المصطلحات والمفاهيم الأساسية

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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