舍伍德数是流体力学中的无量纲数，也被称为质量传递努塞尔特数，指动量与扩散传质系数之比，计算式为：

其中，

The Sherwood number (Sh) (also called the mass transfer Nusselt number) is a dimensionless number used in mass-transfer operation. It represents the ratio of the total rate of mass transfer to the rate of diffusive mass transport alone, and is named in honor of Thomas Kilgore Sherwood.