Speed of fluid in a turbulent flow

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Discussion Overview

The discussion revolves around the changes in fluid speed and density as a fluid transitions from laminar flow to turbulent flow, particularly in the context of a turbulent wake formed behind an object. The focus is on understanding the characteristics of the wake at a specific Mach number of 0.2.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant inquires about the changes in fluid speed and density as a fluid transitions from laminar to turbulent flow.
  • Another participant suggests that the density change is dependent on the Mach number and seeks clarification on whether the question pertains to the velocity and density of a single fluid element or the differences between turbulent and laminar wakes.
  • A further response specifies that the inquiry is focused on the differences between a turbulent wake and a laminar wake at a Mach number of 0.2.
  • One participant clarifies that a wake is defined as the region downstream of the object.

Areas of Agreement / Disagreement

Participants appear to have differing interpretations of the initial question regarding fluid speed and density changes, and the discussion remains unresolved with multiple perspectives on the nature of the wake.

Contextual Notes

The discussion does not clarify assumptions regarding the behavior of fluid properties at different flow regimes or the specific conditions under which the Mach number is considered.

Domenico94
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Suppose a fluid passes from having laminar flow, to having a turbulent flow (like when passing after an object). How do fluid speed and fluid density change after that?
 

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The density answer depends on the Mach number of the flow. For velocity, I'm not quite sure what you're asking. Do you mean to ask how the velocity and density of a single fluid element change as it passes from the front to the back of an object? Or do you mean to ask how a turbulent wake differs from a laminar wake?
 
I was asking for how a turbulent wake ( past an object) differs from a laminar wake( before object) for a mach number of 0.2
 
A wake is, by definition, downstream (behind) the object.
 

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