基于Fluent的数值造波及其对水平板冲击作用初步研究

A Preliminary Study on Numerical Waves and Its Impact on Horizontal Plate With Fluent

该文基于不可压缩黏性流体的N-S方程和RNG湍流模型,利用Fluent软件的二次开发功能,采用VOF方法建立了二维波浪数值水槽。通过UDF定义动边界的运动规律以及在水槽尾端添加消波区的方式,实现了二维线性规则波和二阶stokes波的造波和消波,得到的数值波浪形状和理论波形拟合良好。参照已有物理模型试验资料,数值模拟了波浪对水平板的冲击过程,对比物理试验和数值试验板下11个测压点峰值压强数据,发现数值试验数据较好的拟合了物理试验数据,表明Fluent在模拟波浪与结构物的相互作用方面具有较高的可靠性,为进一步探究影响波浪对水平板冲击压强大小的因素奠定了基础。

Based on the N-S equations for viscous, incompressible fuid and RNG turbulence model, a two-dimensional numerical wave tank is established by utilizing the secondary development function of the software Fluent and the VOF method. A two-dimensional linear regular wave and a second-order stokes wave are generated by defining the motion of moving boundary and adding wave absorption zone at the end of the wave tank. The obtained numerical wave shape agreed well with the theoretical shape. The impact of waves on the horizontal plate is simulated referring to the existing physical model test. By Comparison of the physical and the numerical pressure data of 11 pressure points under the horizontal plate, it is found that they fit well, indicating the effectiveness of Fluent in simulating the interaction between waves and structures, which lays a foundation for further exploring the factors that afect the magnitude of the impact pressure on the horizontal plate.