Tru Physics

Tag: Fluid Dynamics

  • Reynolds Number

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    Introduction The Reynolds number is a fundamental concept in fluid dynamics, enabling us to categorize the flow of fluids and predicting the onset of turbulence. Named after Osborne Reynolds, this dimensionless quantity measures the ratio of inertial forces to viscous forces. The Reynolds Number: Concept and Applications The Reynolds number plays a pivotal role in…

  • Vortex

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    Introduction A vortex is a region within a fluid where the flow revolves around an axis line, which may be straight or curved. This phenomenon is one of the fundamental patterns of fluid motion, observable in various natural and man-made systems, from whirlpools and tornadoes to the spiraling wakes behind airplanes. Basics of a Vortex…

  • Knudsen Number

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    Introduction The Knudsen number is a dimensionless number in fluid dynamics which describes the relative importance of molecular diffusion over molecular momentum transfer in a gas. It is named after the Danish physicist Martin Knudsen. Definition The Knudsen number is defined as the ratio of the molecular mean free path to a characteristic physical length…

  • Torricelli’s Law

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    Introduction Torricelli’s Law describes the speed of fluid flowing under the force of gravity from a container through a small opening or orifice. It’s a fundamental principle in fluid dynamics named after the Italian scientist Evangelista Torricelli. Statement of Torricelli’s Law Torricelli’s Law states that the speed of the efflux (outflow) of a fluid under…

  • Pascal’s Principle

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    Introduction Pascal’s Principle, also known as Pascal’s law, describes how changes in pressure at any point in an enclosed fluid are transmitted undiminished to all points in the fluid and to the walls of its container. It’s a fundamental principle in the science of hydraulics and plays a crucial role in understanding fluid mechanics. Statement…

  • Hydrodynamics

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    Introduction Hydrodynamics is a branch of physics that deals with the motion of fluids and the forces acting upon them. It is a sub-discipline of fluid dynamics, specifically focusing on liquids rather than gases. Fundamental Concepts The fundamental concept of hydrodynamics is the idea that the motion of a fluid can be described mathematically, allowing…

  • Venturi Effect

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    Introduction The Venturi effect is a principle in fluid dynamics that describes how fluid speed and pressure change as it flows through a pipe with varying cross-sectional areas. This phenomenon is named after Giovanni Battista Venturi, an Italian physicist. Fundamental Principle The Venturi effect is a direct consequence of the principle of conservation of energy…

  • Fluid Dynamics

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    Fluid dynamics is the branch of physics that studies the motion of fluids (liquids and gases) and the forces acting upon them. It has applications in various fields, including engineering, meteorology, oceanography, and astrophysics. Fluid Properties To understand fluid dynamics, it’s essential to be familiar with the fundamental properties of fluids: Continuity Equation The continuity…