Real-life phenomenon/application of this fluid dynamics model

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Discussion Overview

The discussion revolves around identifying real-life phenomena or applications related to a fluid dynamics model involving water flow in a converging duct. Participants explore various scenarios where this model might be applicable, considering both trivial and complex applications.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant suggests cake decorating using a conical pastry bag with conical decorating tips as an application of the fluid dynamics model.
  • Another participant agrees with the cake decorating suggestion but notes that the fluid in this case may not be water, raising a question about the properties of the fluid.
  • A conical funnel used in the kitchen to fill a bottle is proposed as another example of the model's application.
  • There is a discussion about whether the problem becomes spherical when using a funnel, with one participant affirming this notion.
  • Another participant questions the need for high-speed water flow in a converging duct and suggests that a 1D convergence might imply a rectangular supply pipe, prompting further inquiry into efficient area "painting" applications.
  • The "curtain coating" process is mentioned as an example involving converging flow, followed by a vertical drop to a moving web.

Areas of Agreement / Disagreement

Participants present multiple competing views and applications without reaching a consensus on a single real-life phenomenon or application. The discussion remains unresolved regarding the implications of the fluid properties and the specific contexts in which the model applies.

Contextual Notes

Participants express uncertainty about the properties of the fluids in different applications and the geometric implications of using funnels versus ducts. There are also unresolved questions about the efficiency of flow in various contexts.

Who May Find This Useful

Individuals interested in fluid dynamics applications, cake decorating techniques, kitchen tools, and industrial coating processes may find this discussion relevant.

rakso
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Thread moved from the technical forums to the schoolwork forums
Hi!

Water is flowing in a converging duct, with the angle α, see the figure.

Skärmavbild 2021-11-28 kl. 13.12.38.png


My task is to find a real-life phenomenon / application of this model, and later solve it numerically / analytically where this fluidproblem occurs. However, my imagination is kinda slow today, what are some fun / trivial / hard applications this? I'm just looking for some different applications to wrap my head around this. Thanks!
 
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A conical funnel is used in the kitchen to fill a bottle.
 
Baluncore said:
A conical funnel is used in the kitchen to fill a bottle.
True. However, doesn't the problem become spherical?
 
rakso said:
However, doesn't the problem become spherical?
Yes.
But where does anyone need a sheet of high speed water, that is possibly still converging?
A 1D convergence might imply a rectangular supply pipe.
When do you need to "paint" an area efficiently?
 

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