Which mechanism causes increased drag when a vehicle exceeds a critical Reynolds number?

💡 Explanation

Exceeding the critical Reynolds number induces a transition to turbulent flow, causing boundary layer separation because the flow can't maintain attachment. This increases pressure drag; therefore separation raises drag, rather than just viscosity change affecting it.

• Which consequence results when the Thiele modulus exceeds unity in a catalyst pellet?
• Which outcome arises when temperature strongly increases in reversible catalysis?
• Which mechanism limits reaction rate when diffusion is slow relative to intrinsic rate constants?
• Which atomic behavior occurs when semiconductors are doped?
• Which outcome is most likely when a Carbon-14 dating standard decays?
• Which risk increases when operating a CANDU reactor near end-of-life?