compressible effect meaning in Chinese

可压缩效应

And the incompressible navier - stokes equations are exactly derived from this incompressible lbgk model , thus the compressible effect due to the density fluctuation is theoretically eliminated
其中密度保持为常数，使得从格子bgk方程能够导出宏观不可压ns方程，理论上消除了因密度变化导致的压缩误差。
According to the mathematic modeling principle of physical problem , the error of lattice boltzmann model is analyzed in chapter 3 . the nonlinear deviation term from the navier - stokes equation is given , and the main model coefficients , such as speed of sound , viscosity and so on , are verified by numerical computation , the results show that the lattice boltzmann method has second order precision in space and in time which satisfy the engineering application , whereas , the compressible effect ca n ' t be neglected along with mach number increasing , and must be reduced or eliminated
其次，按照物理问题数学建模的原则，对格子法的误差进行了分析，给出了格子bgk方程再现navier - stokes方程时的压缩误差项，并数值验证了格子模型的声速及粘性系数等相关参数的精度，表明格子模型尽管具有时空二阶精度，能满足工程计算的要求，但随着mach数增大，压缩误差逐渐成为主要误差，必须予以消除。