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八、显式和隐式格式所谓显式和隐式格式是指对时间积分所采取的两种不同的计算格式.显式格式,简言之就是都可以用前一个时间层的函数值,求出后一个时间层的函数值.这种格式,常用它在实际计算中比较方便而被普遍选用.但是,从时间积分稳定性角度论,这种格式只有在满足一定条件下计算才是稳定的,属条件性稳定,对网格模式讲,空间格距与时间步长之间相互制约.若取空间格距一定,在波速C较大时,Δt需取得较小,因而对一定的积分时间T,运算
Explicit and Implicit Formats The so-called explicit and implicit formats refer to two different calculation formats taken for time integration. Explicit formatting, in short, can be done using the value of the previous time-level function Which is commonly used in the actual calculation. However, from the point of time integral stability, this format is stable only when certain conditions are met , Is a conditional stability, the grid mode, the space between the grid spacing and the time step between the constraints.If the space to take a certain spacing, when the wave velocity C is larger, Δt need to be made smaller, so a certain integral time T, computing