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17 wrz 2024 · Viscosity is the resistance of a fluid (liquid or gas) to a change in shape or movement of neighbouring portions relative to one another. Viscosity denotes opposition to flow.
- Fluidity
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- Stoke
Other articles where stoke is discussed: viscosity:...
- Dynamic Viscosity
In viscosity. The dimensions of dynamic viscosity are force...
- Coefficient of Viscosity
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- Kinematic Viscosity
Other articles where kinematic viscosity is discussed:...
- Bulk Viscosity
Other articles where bulk viscosity is discussed: fluid...
- Deformation
Deformation and flow, in physics, alteration in shape or...
- Pascal
Also known as: Pa. Written and fact-checked by The Editors...
- Fluidity
The precise definition of viscosity is based on laminar, or nonturbulent, flow. Before we can define viscosity, then, we need to define laminar flow and turbulent flow. Figure shows both types of flow. Laminar flow is characterized by the smooth flow of the fluid in layers that do not mix.
In very general terms, the viscous stresses in a fluid are defined as those resulting from the relative velocity of different fluid particles. As such, the viscous stresses must depend on spatial gradients of the flow velocity.
Arterial narrowing results from the aberrant proliferation of vascular smooth muscle cells (VSMCs) and their increased synthesis and deposition of extracellular matrix (ECM) proteins.
The precise definition of viscosity is based on laminar, or nonturbulent, flow. Before we can define viscosity, then, we need to define laminar flow and turbulent flow. Figure 12.10 shows both types of flow. Laminar flow is characterized by the smooth flow of the fluid in layers that do not mix.
Learning Objectives. Define laminar flow and turbulent flow. Explain what viscosity is. Calculate flow and resistance with Poiseuille’s law. Explain how pressure drops due to resistance. Laminar Flow and Viscosity. Laminar Flow Confined to Tubes—Poiseuille’s Law. Flow and Resistance as Causes of Pressure Drops. Section Summary.
viscosity is also referred to as the momentum diffusivity of the fluid, i.e. the ability of the fluid to transport momentum. The above discussion was based on unidirectional flow.
