Controls for maintaining this condition, such as Gaster bumps, seek to prevent attachment-line contamination and T–S waves. Hoods or cabinets named for operating under this condition are used to prevent the contamination of sensitive samples. Tubular reactors operating under this condition (-5[1])allow for high control over the residence time of chemicals because a parabolic velocity profile will develop. When this condition and (10[1])incompressibility hold, the pressure (10[1])drop goes as one over the fourth power of pipe radius by Poiseuille’s (“pwah-ZUH-ee’s”) law. (10[1])Smooth airfoils are designed to induce this condition, reducing drag from eddies and vortices. (-5[1])Poured honey exemplifies a flow with this condition, which occurs at low Reynolds number. (10[1])For 10 points, (10[1]-5[1])name this sheet-like flow in which parallel layers do not mix, unlike turbulent flow. (10[1])■END■ (10[2])