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--- 183_notes:drag [2021/02/04 23:36] – [Fluid Resistance] stumptyl
+++ 183_notes:drag [2021/02/04 23:39] (current) – [Models of fluid resistance] stumptyl
@@ Line 22: / Line 22: @@
 === Laminar drag ===
-For a situation where the Reynolds number is low (e.g., a small, slow-moving object in a viscous fluid), the fluid resistance is proportional to the velocity of the object:
+For a situation where the __Reynolds number is low__ (e.g., a small, slow-moving object in a viscous fluid), the fluid resistance is proportional to the velocity of the object:
 $$\vec{F}_{drag} = -b\vec{v}$$
@@ Line 30: / Line 30: @@
 $$\vec{F}_{drag} = -6\pi\eta r \vec{v}$$
-where $\eta$ is the fluid viscosity.
+where** $\eta$** is the **fluid viscosity**.
+\\
 === Turbulent drag ===
-For a situation where the Reynolds number is high (e.g., a large, fast-moving object in a less viscous fluid), the fluid resistance is proportional to the speed of the object squared:
+For a situation where the __Reynolds number is high__ (e.g., a large, fast-moving object in a less viscous fluid), the fluid resistance is proportional to the speed of the object squared:
 $$\vec{F}_{drag} = -cv^2\hat{v}$$
@@ Line 43: / Line 44: @@
 $$\vec{F}_{drag} = -\dfrac{1}{2} \rho C_d A v^2 \hat{v}$$
-where $\rho$ is the density of the fluid, $A$ is the cross-sectional area of the object in the fluid, and $C_d$ is the drag coefficient of the object, which is often measured experimentally.
+where $\rho$ is the// density of the fluid//, $A$ //is the cross-sectional area of the object in the fluid//, and $C_d$ //is the drag coefficient of the object, which is often measured experimentally//.
+\\
 === What about "medium" Reynolds numbers flows? ===