Which Is Better for Visualizing Jet Flow: Schlieren or BOS Photography?

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Discussion Overview

The discussion revolves around comparing two imaging techniques, Schlieren and Background Oriented Schlieren (BOS), for visualizing jet flow from a heat gun. Participants seek to understand which method provides better insights into flow properties and sensitivity.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks ideas on how to explain the flow characteristics using Schlieren and BOS images.
  • Another participant clarifies the inquiry about which imaging technique provides more information about the flow.
  • A participant expresses the intention to analyze mean/rms pixel shifts and density gradients, questioning how to relate these measurements to Schlieren images for comparison.
  • There is a request for clarification on the acronym 'BOS', indicating some participants may not be familiar with it.

Areas of Agreement / Disagreement

The discussion remains unresolved, with participants exploring different aspects of the imaging techniques without reaching a consensus on which is superior for visualizing jet flow.

Contextual Notes

Participants have not yet established clear definitions or assumptions regarding the sensitivity of the imaging techniques or the specific flow properties being analyzed.

Ahsman
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hi

I have two sets of images, one schlieren and the other BOS. I need some ideas to explain the flow and see which one gives better flow properties. The flow is just a jet out of a heat gun. Any help is much appreciated
 
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You mean which type of image gives you more info about the flow?
 
tade said:
You mean which type of image gives you more info about the flow?
Thank you for the reply.

Yes. And the sensitivity of the two systems. I'll be producing mean/rms of the pixel shift and drho/dx, drho/dy but how do I then link it to schlieren images for comparison?
 
Ahsman said:
hi

I have two sets of images, one schlieren and the other BOS. I need some ideas to explain the flow and see which one gives better flow properties. The flow is just a jet out of a heat gun. Any help is much appreciated

What is 'BOS'? I'm unfamiliar with that acronym.
 

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