By using the semi experiential engineering arithmetic based on the ideology of area ratio, the slope of lift coefficient curve, the zero lift drag coefficient and the induced drag factor of double delta wing aircraft were calculated.

This paper deals with the drag factor of the multiple spherical liquid drops in the creeping motion by means of the Sampson singularities and collocation technique.

Finally in this paper the three-dimension Stokes flow passed an ellipsoid are considered and the corresponding drag factor and the pressure distribution are presented.

The drag factor and the stress distribution on the surface of the sphere are calculated for the sphere in motion in quiescent fluid and for the flow with uniform velocity at the entrance past a rigidly held sphere.

On the basis of P-M theory, the calculations are made for the induced drag factor, the ratio of lift to drag, and the ratio of lift in surfaces on five kinds of three-surface planes and test models.

By using the semi experiential engineering arithmetic based on the ideology of area ratio, the slope of lift coefficient curve, the zero lift drag coefficient and the induced drag factor of double delta wing aircraft were calculated.

By means of truncating the infinite series and applying the collocation method to solve the set of the linear algebraic equations the approximate solution of the Oseen flow of finite clusters of spheres and the drag factor for each sphere are presented.

It is proved by practice that the pipeline lined with the rolling insertion method not only seldom leaks, but also suits to the slushy fluid because the PE linef has high roundness,low frictional drag factor and high resistance to chemical corrosion.

The parameter B (B = DA?0/m) is the well known parameter for koinomatter (ordinary matter) meteors, D is the drag factor, ?0 is the air density at sea level, A is the cross sectional area of the meteoroid and m its mass.

It is also shown that he can be more efficient by increasing the drag factor (using higher vent setting) without increasing force.

By truncating the infinite series and applying the collocation method to solve a set of the linear algebraic equations, the approximate solution of the Oseen flow of finite clusters of spheres and the drag factor for each sphere are presented.

In this paper, the wake effect on drag factor in the axisymmetric Oseen flow of the finite clusters of equally spaced spheres with same size is studied.

The oseen flow of finite clusters of spheres and the wake effect on the drag factor

This paper deals with the drag factor of the multiple spherical liquid drops in the creeping motion by means of the Sampson singularities and collocation technique. The drag factors of the drops are calculated under distinct conditions: different numbers of liquid drops in the chain and different sphere spacings. From the results the influence of the viscosity ratio on the shielding effect and end effect are revealed. The convergence of the method is also studied in this paper.

The creeping motion around a sphere situated axisymmetrically near the entrance of a semi-infinite circular cylindrical tube is analyzed using infinite series solutions for the velocity components, pressure and the stream function. Truncating the infinite series, the corresponding coefficients in the series are determined by a collocation technique. The drag factor and the stress distribution on the surface of the sphere are calculated for the sphere in motion in quiescent fluid and for the flow with uniform...

The creeping motion around a sphere situated axisymmetrically near the entrance of a semi-infinite circular cylindrical tube is analyzed using infinite series solutions for the velocity components, pressure and the stream function. Truncating the infinite series, the corresponding coefficients in the series are determined by a collocation technique. The drag factor and the stress distribution on the surface of the sphere are calculated for the sphere in motion in quiescent fluid and for the flow with uniform velocity at the entrance past a rigidly held sphere. The results indicate that a sphere near the entrance which has a uniform entrance velocity profile will suffer larger drag than that in an infinite tube. The convergence of the collocation technique is tested by numerical calculation. It is shown that the technique has good convergence properties.

This paper deals with the Stokes flow of the arbitrary oblate axisymmetrical body by means of constant density and quadratic distribution function approximation for the method of continuous distribution of singularities, The Sampson spherical infinite series are chosen as fundamental singularities. The convergence, accuracy and the range of application of both two approximations are examined by the unbounded Stokes flow past the oblate spheroid . It is demonstrated that the drag factor and pressure distribution...

This paper deals with the Stokes flow of the arbitrary oblate axisymmetrical body by means of constant density and quadratic distribution function approximation for the method of continuous distribution of singularities, The Sampson spherical infinite series are chosen as fundamental singularities. The convergence, accuracy and the range of application of both two approximations are examined by the unbounded Stokes flow past the oblate spheroid . It is demonstrated that the drag factor and pressure distribution both conform with the exact solution very well. Besides, the properties, accuracy and the range of application are getting bether with improving of the approximation of the distribution function. As an example of the arbitrary oblate axisymmetrical bodies, the Stokes flow of the oblate Cassini oval are calculated by these two methods and the results are conyergent and consistent. Finally, with quadratic distribution approximation the red blood cell is considered and for the first time the corresponding drag factor and pressure distribution on the surface of the cell are obtained.