FlowVision: Industrial computational fluid dynamics
FlowVision: Industrial computational fluid dynamics
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DOI：
10.20537/2076-7633-2017-9-5-20
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发表时间：
2017-01-01
影响因子：
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通讯作者：
Aksenov, Andrey A.
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文献类型：
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作者：
Aksenov, Andrey A.
这项工作提交了新版本的FlowVision软件，旨在自动化的工程计算在计算流体动力学：FlowVision 3.09.05。FlowVision软件用于解决不同的工业问题。它的流行是基于解决涉及不同物理过程的复杂非传统问题的能力。像网格生成这样的劳动密集型和耗时过程的完全自动化范例使得FlowVision对许多工程师具有吸引力。FlowVision是完全独立于开发人员的软件。它包括一个先进的图形界面，用于指定计算项目的系统，以及通过不同方法在平面，曲面和体积上进行流动可视化的系统：图，彩色等高线，等值线，等值面，矢量场。除此之外，FlowVision还提供了计算表面和体积区域的积分特性的工具。该软件是基于有限体积法来近似描述流体运动和伴随的物理过程的偏微分方程。它提供了显式和隐式的时间积分这些方程的方法。该软件包括非结构化网格的自动生成器，具有局部动态适应能力。求解器涉及两级并行，允许在具有分布式和共享内存（共存于同一硬件中）的计算机上进行计算。FlowVision集成了广泛的物理模型：不同的湍流模型、考虑化学反应和放射性衰变的传质模型、几种燃烧模型、分散相模型、电流体动力学模型、用于跟踪移动界面的原始VOF模型。应该注意的是，湍流可以在URANS、LES和ILES方法中模拟。FlowVision模拟流体运动的速度对应于所有可能的流动状态：从不可压缩到高超音速。这是通过使用一个原始的全速速度-压力分裂算法的Navier-Stokes方程的集成。FlowVision能够使用不同的建模工具解决多个问题。例如，可以使用VOF方法模拟多相流，流过在固定网格上移动的物体的流（在欧拉方法内），使用滑动网格技术模拟旋转机器中的流。此外，该软件还利用FlowVision与有限元程序的双向耦合技术解决了流固耦合问题。在给定的文章中演示了解决FlowVision软件中具有挑战性的问题的两个例子。第一种是航天器借助喷气发动机减速后溅落。该问题的特点是在计算域中存在运动物体和空气与水之间的接触面。超音速射流与空气-水界面相互作用。第二个问题是模拟人类心脏的工作与人工和天然瓣膜设计的基础上，断层摄影研究与使用的有限元模型的心脏。这个问题的特点是“液体”计算域和哈特肌肉有限元模型之间的双向耦合。
The work submits new release of the FlowVision software designed for automation of engineering calculations in computational fluid dynamics: FlowVision 3.09.05. The FlowVision software is used for solving different industrial problems. Its popularity is based on the capability to solve complex non-tradition problems involving different physical processes. The paradigm of complete automation of labor-intensive and time-taking processes like grid generation makes FlowVision attractive for many engineers. FlowVision is completely developer-independent software. It includes an advanced graphical interface, the system for specifying a compu-tational project as well as the system for flow visualization on planes, on curvilinear surfaces and in volume by means of different methods: plots, color contours, iso-lines, iso-surfaces, vector fields. Besides that, FlowVision provides tools for calculation of integral characteristics on surfaces and in volumetric regions. The software is based on the finite-volume approach to approximation of the partial differential equations describing fluid motion and accompanying physical processes. It provides explicit and implicit methods for time integration of these equations. The software includes automated generator of unstructured grid with capability of its local dynamic adaptation. The solver involves two-level parallelism which allows calculations on computers with distributed and shared memory (coexisting in the same hardware). FlowVision incorporates a wide spectrum of physical models: different turbulence models, models for mass transfer accounting for chemical reactions and radioactive decay, several combustion models, a dispersed phase model, an electro-hydrodynamic model, an original VOF model for tracking moving interfaces. It should be noted that turbulence can be simulated within URANS, LES, and ILES approaches. FlowVision simulates fluid motion with velocities corresponding to all possible flow regimes: from incompressible to hypersonic. This is achieved by using an original all-speed velocity-pressure split algorithm for integration of the Navier-Stokes equations. FlowVision enables solving multi-physic problems with use of different modeling tools. For instance, one can simulate multi-phase flows with use of the VOF method, flows past bodies moving across a stationary grid (within Euler approach), flows in rotary machines with use of the technology of sliding grid. Besides that, the software solves fluid-structure interaction problems using the technology of two-way coupling of FlowVision with finite-element codes. Two examples of solving challenging problems in the FlowVision software are demonstrated in the given article. The first one is splashdown of a spacecraft after deceleration by means of jet engines. This problem is characterized by presence of moving bodies and contact surface between the air and the water in the computational domain. The supersonic jets interact with the air-water interphase. The second problem is simulation of the work of a human heart with artificial and natural valves designed on the basis of tomographic investigations with use of a finite-element model of the heart. This problem is characterized by two-way coupling between the “liquid” computational domain and the finite-element model of the hart muscles.