Impingement Angle
Impingement Angle - Related Videos
13:29
Jet Impinging on an Inclined Plate
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI The goal of this experiment is to demonstrate how a fluid flow exerts forces on structures by conversion of dynamic pressure into static pressure. To this end, we will make a plane jet impinge on a flat plate and will measure the resulting pressure distribution along the plate. The resultant force will be estimated by integrating the product between the...
11:31
Determination of Impingement Forces on a Flat Plate with the Control Volume Method
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2023
Source: Ricardo Mejia-Alvarez and Hussam Hikmat Jabbar, Department of Mechanical Engineering, Michigan State University, East Lansing, MI The purpose of this experiment is to demonstrate forces on bodies as the result of changes in the linear momentum of the flow around them using a control volume formulation [1, 2]. The control volume analysis focuses on the macroscopic effect of flow on engineering systems, rather than the detailed description that could be achieved with a differential...
01:13
Contact Angle
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2023
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces. The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive force...
01:27
Open Angle Glaucoma: Treatment
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2023
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow. Drugs such as carbonic anhydrase inhibitors, α2- and...
01:13
Angle of Twist: Problem Solving
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2024
An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the torque exerted...
FAQs
The angle determines how much of the incoming velocity acts normal to the surface and how much remains parallel to it. The normal component contributes more strongly to impact loading and stagnation pressure, while the parallel component promotes surface shear. This division helps engineers evaluate momentum transfer and anticipate whether loading or sliding-related effects will dominate.
Changing the angle changes the balance between normal impact and tangential motion at the surface. That balance can modify stagnation pressure, shear stress, spreading, rebound, deposition, and erosion. Consequently, the same fluid, particle, droplet, or jet may produce different material responses when its approach direction changes, even if other operating conditions remain similar.
A change in angle can shift the interaction among spreading, rebound, deposition, and erosion. An impact direction that favors surface attachment may support deposition, whereas another direction may increase rebound or expose the surface to stronger erosive effects. Engineers therefore treat angle as an important variable when predicting coating behavior, particle impacts, and surface damage.
Engineers relate the selected angle to the incoming flow or particle direction, the target surface, and the response of interest. They then assess outcomes such as momentum transfer, surface loading, shear stress, deposition, erosion, or heat and mass transfer. Comparing these responses across angles helps identify conditions that improve performance or reduce damage.
In fluid jets and spray systems, angle affects how material or fluid reaches a surface, influencing spreading, deposition, and heat or mass transfer. Engineering designs can use this relationship to improve cooling efficiency or coating uniformity. The parameter is therefore relevant wherever a controlled jet or spray must interact consistently with an engineered surface.
Turbine and pipeline components may encounter jets or particle-laden flows that load or erode their surfaces. Accounting for the approach angle helps engineers predict momentum transfer, shear stress, and erosion patterns. This analysis supports surface protection and can contribute to longer service life by identifying configurations that limit damaging impacts on critical components.