On the 8th-order drag coefficient formula of a sphere in a uniform stream: A simplified description粘滞性流体粘滞摩擦系数公式雷诺数laThepaperwasreceivedonIntroductionLetusconsiderthesteady-statelarninarflowofincompressibleviscousfluidpastastillsphere.AssumethatatinfinitytheflowisauniformstreamwithspeedUoo.Leta...
The formula for the pressure‐drag coefficient of a sphere which moves at extremely high speeds is derived. In the derivation it is assumed that the nose of the shock contour follows exactly the frontal half of the spherical surface and the local pressure on the frontal spherical surface corresp...
The famous drag model by (Schiller and Naumann, 1935) correlates the drag coefficient for a single and rigid sphere by dividing relative bubble Reynolds Reb number into two ranges. For Reb≤1000, CD is a function of relative Reynolds number only and for Reb>1000, CD has a constant value ...
With Cf,lamas the overall friction drag coefficient, the wall shear stress in equation (11) refers to the entire surface area A of the plate (mean wall shear stress τw). Thus, the acting frictional force Ff,lamon this surface can be calculated using the following formula: τ¯¯¯w...
A mechanical model dependent on the force balance of settling particles was adopted, and the experimental data were analyzed in detail. A model for predicting the drag coefficient of spherical particles in the power-law fluids was established. On this basis, a two-dimensional shape description ...
1. What is the formula for calculating the area considered to calculate drag coefficient of a vehicle? The formula for calculating the area considered to calculate drag coefficient of a vehicle is A = L x W, where A is the area, L is the length of the vehicle, and W is...
A formula for the fluid-solids drag coefficient for a multiparticle system is derived from a Richardson-Zaki type velocity-voidage correlation. The formula compares favorably with the Ergun equation in the void fraction range of 0.5-0.6 and correctly reduces to a formula for the single-particle dr...
I am trying to calculate the stokes drag on a sphere held stationary in a flow at reynolds number = 0.1 particle size is 2mm dia and the outer domain I have is 12 dia ( R2/R1 = 24 ). Stokes drag claculated using the formula Drag=6*pi*Meu*radius*U0...
Here,η, theviscosityof the sample fluid, is known and immediately allows the determination of thefriction coefficientβof the sphere. The fluid velocity,ν, can be measured in the case of external fluid flow by either tracking the trapped object when the trap is switched off or measuring the...
CD is called the drag coefficient of the particle and Rep the particle Reynolds number. In spite of the apparent simplicity of the flow pattern that surrounds a moving sphere, it is not possible to derive a relationship between CD and Rep from fundamental fluid mechanical principles. The ...