The discussion focuses on the distinction between unsteady and turbulent flow in fluid dynamics, exploring definitions, characteristics, and examples relevant to both concepts. The conversation includes inquiries about visual representations and real-life examples of these flow types.
Participants do not reach a consensus on the definitions and classifications of flow types, with ongoing questions and clarifications regarding the relationship between laminar, unsteady, and turbulent flows.
There are unresolved questions about the definitions and characteristics of laminar flow in relation to turbulence, as well as the need for visual examples to clarify the concepts discussed.
Why does laminar include in "based on turbulence" when there are no turbulences?FEAnalyst said:We can divide fluid flows into several types, in this case based on:
- time dependence:
* steady (stationary) flow - fluid properties at any selected point in a system do not change in time
* unsteady (transient) flow - this one is time-dependent
- turbulence:
* laminar - there are no turbulences
* turbulent - turbulations are present in the system
Turbulent flow is generally always unsteady because turbulence is a time-dependent phenomenon. Such flow can be statistically stationary though.
Laminar flow can be either steady or unsteady.