Research Projects

Bloodstain is crucial for forensic science experts to investigate crime scenes, as it provides information on the location of the victim and aids in reconstructing the scene. Bloodstain size and shape depend on the spreading and splashing of blood drops on the solid substrate. Blood simulants are often used to conduct experimental studies, but they neglect the viscoelastic nature of plasma and do not contain microparticles. The elasticity of red blood cells (RBCs) can store kinetic energy of droplet impact in form of elastic energy and later release it, significantly affecting the spreading and splashing phenomena. Satellite drop formation around the main drop depends on the viscoelasticity of the plasma. To study the impact dynamics of colloidal suspension drops, researchers propose using a colloidal suspension of deformable particles in a viscoelastic fluid. This study will address fundamental aspects such as the role of deformable dispersed microparticles in base fluid on spreading, splashing, and fingering phenomena, as well as the effect of viscoelasticity of base fluid on droplet impact dynamics. The study will also examine the effects of parameters like impact velocity, angle of impact, substrate type, and air flow around the drop. Comparing the results with real blood will help set accurate guidelines for blood simulant formulation, provide reliable relations for forensic experts, and enhance our understanding of complex fluid drop spreading and splashing.