| 于海洋,张林,周媛.流体冲击障碍物的非等温复杂流动SPH模拟[J].计算力学学报,2025,42(5):859~864 |
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| 流体冲击障碍物的非等温复杂流动SPH模拟 |
| SPH simulation of non-isothermal complex flow with fluid impacting obstacles |
| 投稿时间：2024-05-31 修订日期：2024-07-28 |
| DOI：10.7511/jslx20240531001 |
| 中文关键词: SPH 非等温流动 撞击流 自由面 粒子位移修正 |
| 英文关键词:SPH non-isothermal flow impacting flow free surface particle shifting technique |
| 基金项目:化工冶金低碳变革技术及示范(XDA0390502);介科学与工程国家重点实验室(MESO-24-A04;MESO-23-A01)资助项目. |
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| 中文摘要: |
| 流体冲击障碍物的非等温复杂流动在核能利用等工业过程中十分重要。本文耦合密度耗散项、人工粘性项、粒子位移修正等多种数值技术,建立起一种稳定和准确的非等温SPH格式,实现流体冲击障碍物非等温复杂流动的精确模拟。通过非等温圆柱绕流、绕单/多障碍物非等温溃坝的模拟,表明本文建立的SPH格式不仅能计算出光滑的压力场,避免数值解的虚假振荡,还能给出准确的温度场分布和关键物理量;且能准确预测热传导过程和自由液面复杂演化的相互作用,具有模拟绕多障碍物非等温复杂流动的能力。 |
| 英文摘要: |
| The non-isothermal complex flow caused by fluid impacting obstacles is very important to the industrial processes such as nuclear energy utilization.Through coupling various numerical techniques such as the density diffusive term,artificial viscous term,particle shifting technique,a stable and accurate non-isothermal smoothed particle hydrodynamics(SPH)scheme is established,and accurate simulation of non-isothermal complex flow caused by fluid impacting obstacles is realized.Based on the simulation for the non-isothermal flow past a heated cylinder,the non-isothermal dam break past single/multiple obstacles,it is demonstrated that:(1)the developed non-isothermal SPH scheme can not only compute a smooth pressure field and avoid the spurious oscillation of numerical solutions,but also predict accurately the temperature field and the key physical quantities;(2)this SPH scheme can also accurately show the interaction between the heat conduction process and the complex free-surface evolution,and has the capability to simulate non-isothermal complex flows past multiple obstacles. |
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