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Biomedical subjects

J R Shanebrook

Publications and source records attributed to J R Shanebrook.

5 recordsLinked to original sources
PubMed1995

Flow visualization with air and smoke in a bypass graft model under steady flow conditions.

A new technique for visualizing the steady flow of a new type of test fluid is presented that produces quality photographic results at Reynolds numbers typically found in arterial bypass grafts. Room air functions as the test fluid and smoke from burning incense sticks provides the tracer particles. As an example of this new technique, photographic results are presented for a Reynolds number flow of 205 through a Plexiglas model of an end-to-side distal anastomosis with a 45 degrees junction angle. The advantages of this technique are that it is simple, convenient, and applicable to a wide variety of flow conditions found in the human cardiovascular system.

Air↗
PubMed1976

Aerodynamic drag analysis of runners.

A model is presented for the determination of aerodynamic drag forces on runners. The model consists of a series of conjugated circular cylinders, to stimulate the trunk and appendages, and a sphere to stimulate the head. Results are presented for three runners representing respectively, adult American males in the 2.5, 50 and 97.5 percentiles of the population. It is found that power dissipated in overcoming air resistance for these three runners ranges from 0.33 to 0.49 horsepower at a sprint speed comparable to the current world's record for one hundred yards. In addition an alternate model, consisting of a single circular cylinder, is presented that simplifies the determination of total aerodynamics drag. The accuracy of this model is determined by comparing results for total drag with those found with the more complex model. It is found that the error ranges from 5 to 8.9 percent.

Energy Metabolism↗