Theory 085/Law & Forensic Science
Stain Patterns Are a Viscosity Ratio
The claim
Bloodstain pattern geometry is set by the ratio of impact energy to viscosity rather than by impact energy.
01The mechanism
Droplet breakup depends on the balance between inertia and viscous resistance; the same energy on a more viscous fluid yields larger, fewer stains.
02Predictions
- P1Pattern should collapse onto the ratio.
- P2Energy alone should mispredict.
03Refutation
Pattern tracking energy would remove the viscosity term.