Radial distributions of temperature pressure and velocities for pulsatile blood flow in an axisymmetrical stiff tube.
Using perturbation theory with the assumption that the pulsatile blood flow in an axisymmetrical stiff tube is the first-order term to solve the linear equations of continuity, motion and heat conduction, the equations of the pulsatile flow, including temperature, are derived, and the instantaneous radial distribution of temperature, pressure and velocities for one frequency component are obtained. Using the published geometrical and physiological parameters of a large artery, a numerical analysis of the distribution relationship between the axial velocity and temperature is carried out. The primary studies show that the amplitude of temperature fluctuation in the tube is inversely proportional to the pulsatile frequency, the temperature and velocities gradients are mainly restricted in the near-wall layers with the increase of pulsatile frequency, and there is a close similarity of the radial pulsating distribution between temperature and axial velocity, which indicates that the blood flux in the artery as well as the motion function of heart can be indirectly described by the measurement of temperature fluctuation.
Yao
Li
L
Staff Room of Physics, Nantong Medical College, Nantong 226001, Jiangsu, People's Republic of China.
Liao
Donghua
D
Zeng
Yanjun
Y
Xu
Xiaofu
X
Xu
Hong
H
D000818:Animals; D001158:Arteries / Q000502:physiology*; D001783:Blood Flow Velocity / Q000502:physiology*; D001794:Blood Pressure / Q000502:physiology*; D001795:Blood Pressure Determination / Q000379:methods; D001831:Body Temperature / Q000502:physiology*; D003198:Computer Simulation; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D006801:Humans; D008955:Models, Cardiovascular; D011673:Pulsatile Flow / Q000502:physiology*; D013223:Statistics as Topic; D013817:Thermography / Q000379:methods