Thermal B.L Vs Viscous B.L

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The discussion focuses on achieving similar properties between thermal and viscous boundary layers for flow visualization using the Schlieren technique on a flat plate. Key properties to consider include temperature distribution, velocity profiles, and transition points to turbulence. Participants emphasize the importance of understanding how thermal effects influence flow characteristics and the methods for comparing these boundary layers. Clarification is sought on what is meant by "similar in properties" and which specific properties should be compared. The conversation highlights the need for precise definitions and methodologies in analyzing boundary layer behavior.
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How can I get the same properties of viscous B.L using thermal boundary layer as I am making a flow visualization for flow transition to turbulent using Schlieren Technique for flat plate? And also how can I compare between them in this situation?
 
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What do you mean by "similar in properties"? Which properties?
 

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