Advertisement

Topics

Implications of two backward blood spatter models based on fluid dynamics for bloodstain pattern analysis.

08:00 EDT 19th May 2019 | BioPortfolio

Summary of "Implications of two backward blood spatter models based on fluid dynamics for bloodstain pattern analysis."

Bloodstain pattern analysis (BPA) is an integral part of crime scene investigation. For violent crimes involving gunshots, standard practice in police departments worldwide have some physical limitations. For instance, the effect of gravity and air drag on trajectories of blood droplets are neglected using current reconstruction methods, which results in a well-known overestimation of the height of the source of blood. As a consequence, more sophisticated models for blood spatter trajectory reconstruction are being developed, two of which are highlighted in the present work. They allow the prediction of bloodstain patterns produced from backward spattered blood droplets from blunt and sharp bullets. Our recent models attribute the splashing of blood to the Rayleigh-Taylor instability which arises when blood is accelerated towards lighter air. This physically-based description comes with the powerful predictive capability to correlate features of bloodstain patterns with the specific bullet and gun that produced them, as well as with the body position. The results of the numerical models were compared with four experiments simulating blood spatter deposition on a vertical wall through the number of stains produced, average stain area, and average impact angle at the surface, and the agreement found is fairly good. Moreover, further insight is obtained by probing and explaining the influence of observable parameters on the resulting spatter pattern, with the goal of aiding BPA experts evaluating a crime scene.

Affiliation

Journal Details

This article was published in the following journal.

Name: Forensic science international
ISSN: 1872-6283
Pages: 299-305

Links

DeepDyve research library

PubMed Articles [32633 Associated PubMed Articles listed on BioPortfolio]

Determining the region of origin of blood spatter patterns considering fluid dynamics and statistical uncertainties.

Trajectory reconstruction in bloodstain pattern analysis is currently performed by assuming that blood drop trajectories are straight along directions inferred from stain inspection. Recently, several...

Charts based on millions of fluid dynamics simulations provide a simple tool to estimate how far from its source a specific blood stain can be found.

The bloodstain pattern analyst sometimes has to judge if a given stain could originate from a specific location. A wide range of values of the maximum distance that a blood drop can travel have been r...

Impact Spatter Bloodstain Patterns on Textiles.

There are few reports of studies of impact spatter on textiles even though bloodstained textiles are found at many violent scenes. Impact spatter was deposited at 90° impact angle onto three knit fab...

Stability analysis for a thermodynamically consistent model of relativistic fluid dynamics.

In relativistic fluid mechanics, positive entropy production is known to be insufficient for guaranteeing stability. Much stronger criteria for thermodynamic admissibility have become available in non...

Fluid dynamics in a full-scale flat sheet MBR, an experimental and numerical study.

Fluid dynamics is used for fouling mitigation in membrane bioreactors (MBRs), whereby a proper understanding of the fluid dynamics is of great interest. The influence of fluid dynamics has led to the ...

Clinical Trials [11689 Associated Clinical Trials listed on BioPortfolio]

A Controlled Trial of Effectiveness of a Backward Walking Program in Patients Recovering From Abdominal Aorta Surgery

Summary Question: Does backward walking offer additional therapeutic value in patients after aortic aneurysm surgery? Participants: The study of backward walking as an addictive physiother...

Fluid-dynamics in Bifurcation PCI

Investigator-initiated, international, multicentre, observational study with two cohorts. The two study cohorts will be: Cohort A: to understand if the local blood flow patterns (associa...

HIV-DNA Dynamics in HIV Monoinfected or HIV/HCV Coinfected Patients

New markers of viral activity are now under investigation. Aim of the study is to investigate the efficacy of new antiretroviral drugs by monitoring HIV-DNA dynamics in HIV-positive popula...

Blood and Fluid Management During Scoliosis Surgery

In the present retrospective study, we hypothesized that application, in scoliosis surgery, of a protocol for blood and fluid management, based on goal directed fluid therapy, cell salvage...

Impact of Hyperoncotic Albumin to Support Blood Loss Replacement

Fluid treatment is usually performed with either balanced crystalloid fluids or iso-oncotic colloids, (synthetic colloids, plasma and 5% albumin). Doubts have been raised about synthetic c...

Medical and Biotech [MESH] Definitions

The mechanical laws of fluid dynamics as they apply to urine transport.

Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.

Statistical models in which the value of a parameter for a given value of a factor is assumed to be equal to a + bx, where a and b are constants. The models predict a linear regression.

The body fluid that circulates in the vascular system (BLOOD VESSELS). Whole blood includes PLASMA and BLOOD CELLS.

Statistical models of the production, distribution, and consumption of goods and services, as well as of financial considerations. For the application of statistics to the testing and quantifying of economic theories MODELS, ECONOMETRIC is available.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Relevant Topic

Collaborations in biotechnology
Commercial and academic collaborations are used throughout the biotechnology and pharmaceutical sector to enhance research and product development. Collaborations can take the form of research and evaluation agreements, licensing, partnerships etc. ...


Searches Linking to this Article