In present paper, an investigation has been made on the fluctuating flow of a non-Newtonian second grade fluid through a porous medium over a semi-infinite porous plate in presence of a transverse magnetic field B0. T...In present paper, an investigation has been made on the fluctuating flow of a non-Newtonian second grade fluid through a porous medium over a semi-infinite porous plate in presence of a transverse magnetic field B0. The governing equations have been solved analytically and the expressions for the velocity and stress fields are obtained. The free stream velocity U(t) fluctuates in time about a non-zero constant mean. The effects of the permeability parameter K and magnetic field parameter M on velocity field have been analyzed quantitatively with the help of figures. It is noticed that the velocity field asymptotically approaches free stream velocity as it goes far away from the plate.展开更多
AVI文件是Windows操作系统下最常用的流媒体文件格式之一,了解AVI文件格式是正确使用AVI文件的基础,以一个具体的AVI文件的二进制码为例,详细解释和研究AVI文件的各个字段的具体含义,并指出AVI-1文件与AVI-2文件格式的区别,在此基础上,...AVI文件是Windows操作系统下最常用的流媒体文件格式之一,了解AVI文件格式是正确使用AVI文件的基础,以一个具体的AVI文件的二进制码为例,详细解释和研究AVI文件的各个字段的具体含义,并指出AVI-1文件与AVI-2文件格式的区别,在此基础上,可以对AVI文件进行各种编程操作。给出使用VFW(Video For Windows)用VisualC++编程语言从AVI-2文件中获取视频帧,转换为BMP图像,加以显示并存储为位图文件的编程方法。展开更多
文摘In present paper, an investigation has been made on the fluctuating flow of a non-Newtonian second grade fluid through a porous medium over a semi-infinite porous plate in presence of a transverse magnetic field B0. The governing equations have been solved analytically and the expressions for the velocity and stress fields are obtained. The free stream velocity U(t) fluctuates in time about a non-zero constant mean. The effects of the permeability parameter K and magnetic field parameter M on velocity field have been analyzed quantitatively with the help of figures. It is noticed that the velocity field asymptotically approaches free stream velocity as it goes far away from the plate.
文摘AVI文件是Windows操作系统下最常用的流媒体文件格式之一,了解AVI文件格式是正确使用AVI文件的基础,以一个具体的AVI文件的二进制码为例,详细解释和研究AVI文件的各个字段的具体含义,并指出AVI-1文件与AVI-2文件格式的区别,在此基础上,可以对AVI文件进行各种编程操作。给出使用VFW(Video For Windows)用VisualC++编程语言从AVI-2文件中获取视频帧,转换为BMP图像,加以显示并存储为位图文件的编程方法。