Question: For laminar boundary layer flow over a flat plate with air at 20C and 1 atm, the thermal boundary layer thickness 8r is approximately 13%

For laminar boundary layer flow over a flat plate with air at 20°C and 1 atm, the thermal boundary layer thickness 8r is approximately 13% larger than the velocity boundary layer thickness 8. Determine the ratio 8/8 r if the fluid is ethylene glycol under the same flow conditions.

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