Velocity distribution can be expressed by a logarithmic formula for the inner zone and a parabolic formula for outer and surface zones.
底部内区流速分布可用对数公式表示；外区和表面区可用二次抛物线公式表示。
However, under the different conditions of flow and boundary, exponent values in the exponential formula and related parameters in the logarithmic formula are different.
然而，在不同水流与边界条件下，其指数公式中的指数大小与对数公式中的有关参数有所不同。
It was found that in double logarithmic coordinates, the relationship of formation factor and porosity is a second order function and no longer the linear formula proposed by Archie in 1940's.
在双对数坐标系中，由低孔隙到高孔隙整个范围，砂岩地层因素与孔隙率的关系为一个二次函数。
When the Einstein logarithmic resistance formula is used to calculate the resistance of sidewall and bed flow respectively, the closure problem of equation group can be solved.
将分别对应于边壁和床面的爱因斯坦阻力公式应用阻力计算中，可以解决方程组不闭合的问题。
When the Einstein logarithmic resistance formula is used to calculate the resistance of sidewall and bed flow respectively, the closure problem of equation group can be solved.
将分别对应于边壁和床面的爱因斯坦阻力公式应用阻力计算中，可以解决方程组不闭合的问题。
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