Effect of Viscous Dissipation (Φ) on Temperature Distribution of Blood Plasma in Presence of a Magnetic Field

Applications of heat transfer show the variations in temperature of the body which is helpful for the purpose of thermal therapy in the treatment of tumor glands. This study considered theoretical approaches in analyzing the effect of viscous dissipation on temperature distribution on the flow of blood plasma through an asymmetric arterial segment. The plasma was considered to be unsteady, laminar and an incompressible fluid through non-uniform arterial segment in a two-dimensional flow. Numerical schemes developed for the coupled partial differential equations governing blood plasma were solved using Finite Difference scheme (FDS). With the aid of the finite difference approach and the related boundary conditions, results for temperature profiles were obtained. The study determined the effect of viscous dissipation on temperature of blood plasma in arteries. The equations were solved using MATLAB softwares and results were presented graphically and in tables. The increase in viscous dissipation tends to decrease blood plasma heat distribution. This study will find important application in hospitals.

Mathematical Model of Blood Flow in Small Blood Vessel in the Presence of Magnetic Field

A mathematical model for blood flow in the small blood vessel in the presence of magnetic field is presented in this paper. We have modeled the two phase model for the blood flow consists of a central core of suspended erythrocytes and cell-free layer surrounding the core. The system of differential equations has been solved analytically. We have obtained the result for velocity, flow rate and effective viscosity in presence of peripheral layer and magnetic field .All the result has been obtained and discussed through graphs.

The Blood Flow of Prandtl Fluid Through a Tapered Stenosed Arteries in Permeable Walls with Magnetic Field

This Communication deals with the blood flow of Prandtl fluid through a tapered stenosed arteries having permeable walls.The governing equations of two-dimensional Prandtl fluid model are modelled in cylindrical coordinates.The highly nonlinear equations are simplified with the help of non-dimensional variables under the assumption of mild stenosis.The solution of reduced nonlinear equation subject to boundary condition of porous walls having the effects of Darcy's number and slip parameter are computed analytically with the help of perturbation method.Effects of emerging parameters such as impedance A,slip parameter a,stenosis height 6,magnetic parameter and stress component Srz on velocity are illustrated graphically.The streamlines have also been presented to discuss the trapping bolus discipline.

极低频磁场对兔血常规和肝肾功能的影响

为研究极低频磁场长期暴露对日本长耳大白兔血常规及肝肾功能的影响,验证现行电磁场限值合理性,选用80只日本长耳大白兔(雌雄各半)在不同强度磁场(磁感应强度分别为30、100、200μT,频率为50Hz)中暴露4个月,磁场暴露前和磁场暴露期间,每月记录兔体质量,同时检测血常规和肝肾功能。实验结果显示:暴露期间,兔体质量逐渐增加,各组间无显著性差异(概率P>0.05)。与对照组(磁感应强度为0)相比,血常规及肝肾功能无明显差异(P>0.05)。结果表明,选定的实验条件下ELE-MF对日本长耳大白兔体质量无影响,对血常规和肝肾功能也无影响。

等离子弧堆焊层的组织与性能的磁场控制

在对两种铁基合金(Fe5和Fe3)进行等离子弧堆焊过程中加入纵向直流磁场来控制堆焊层的硬质相形态及分布,并对两种堆焊层进行了硬度、磨损试验,显微组织及X射线衍射分析。并对两种粉末的堆焊层组织性能进行了研究。结果表明,施加磁场的堆焊层要比无磁场作用的堆焊层硬度高、耐磨性好;磁场电流为3A时的堆焊层性能最佳;合金堆焊层的显微组织α、γ固溶体被充分细化,并获得了理想的硬质相Cr7C3、CrB等。

磁处理不同溶液对血浆中某些生化指标的影响

采用调磁、静磁场处理不同溶液测定血浆生化指标，探讨其影响机理，指导临床。方法用正常人血浆，实验分对照组、调磁组、静磁组，各组用同份血浆，每组设测定管，标准管，测K+、Na+。P、BUN、MMS、血糖、CK、LDH、GPDA等测得数据经统计学处理后进行分析比较。结果静磁场和调磁场处理溶液均能显著降低GPDA的活性，但调磁场的作用极为显著。两种磁场均能使血浆Na+含量降低，而静磁场对BUN测定时呈色反应具有显著的影响，校对照组和调磁场组的颜色明显谈浅。结论两种磁场均可升高血浆K+含量和降低Na+的含量，调磁场磁化溶液可显著低GPDA的活性，而静磁场磁化溶液可显著升高CK、LDH的活性降低GPDA的活性。同时观察到调磁场对GPDA的活性有极强的抑制作用。静磁场使BUN测定时的呈色反应明显变浅．而调磁场却不明显，另外，静磁场和调磁场均具有显著降低血浆MMS效应。