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AICFD - Intelligent Thermal Fluid Simulation Software, officially released!

AICFD is a universal intelligent thermal fluid simulation software independently developed by Nanjing Tianhe Software Co., Ltd. It achieves rapid and intelligent simulation of flow and heat transfer. Its functions can be divided into five parts: model import, automatic and rapid grid generation, rapid simulation, result visualization and post-processing, and intelligent acceleration, covering the complete simulation analysis process from geometric modeling to simulation results. Through a modern graphical interface combined with numerical simulation and intelligent acceleration algorithms, AICFD provides users with easy-to-use intelligent thermal fluid simulation capabilities. AICFD, as a universal thermal fluid simulation software, helps industrial enterprises establish an integrated process of design, simulation, and optimization, greatly improving product development efficiency.

Functional Features

(1) One click simulation

The vast majority of existing commercial simulation software on the market have complex operations and long learning times, mainly targeting simulation personnel, but not friendly to designers. AICFD provides a graphical and integrated simulation process, where users can automatically complete complex integrated simulation processes such as grid generation, calculation, and post-processing by setting the necessary parameters. It is very friendly to designers.

(2) Fluid simulation function for industrial design

AICFD provides the fluid simulation function commonly used in industrial design. The flow types include single-phase incompressible flow, single-phase compressible flow (supporting subsonic, transonic and supersonic flow), heat transfer, multiphase flow flow, etc. It supports multi region flow and heat transfer simulation, making it applicable to complex industrial flows such as flow and heat transfer simulation in turbomachinery and heat exchangers. AICFD provides a variety of robust numerical formats and boundary conditions, as well as commonly used physical models, providing a universal thermal fluid simulation tool for designers in fields such as energy and power, shipbuilding and ocean, aerospace, and automotive.

(3) Fast intelligent simulation and real-time simulation

At present, the simulation time of commercial simulation software is relatively long, usually taking several hours, days, or even weeks. AICFD uses artificial intelligence technology and other methods to accelerate simulation calculations, which can achieve second level simulation and greatly improve simulation efficiency. For the simulation of specific models, real-time simulation is achieved through a deep combination of simulation technology and artificial intelligence technology. The rapid intelligent simulation and real-time simulation methods make AICFD an intelligent simulation tool that designers can use on a daily basis.

Figure 3 Rapid intelligent simulation and real-time simulation

(4) Universality and Scalability

AICFD, as a universal thermal fluid simulation software, has a wide range of application areas due to the universality of its core computing modules. At the same time, for simulation in the specialized simulation field, in-depth analysis of its simulation process can further optimize the simulation module, thereby improving the accuracy of simulation and the convenience of operation.

(5) Friendly human-computer interaction interface, cross platform support

AICFD provides a client-based graphical interface that can meet complex and heavyweight simulation computing needs. At the same time, it supports cross platform and can provide Windows and Linux distributions.

Practical cases

(1) Cyclone separator

This case is a cyclone separator, which is a common separation and classification equipment that uses the principle of centrifugal sedimentation to remove material particles from the fluid. The flow involved in this case is an incompressible flow, where the fluid enters the cyclone separator from the inlet and swirls downwards to the bottom, then upwards and exits from the outlet.

(2) ONERA M6 wing flow

In this case, the M6 wing is a wing model designed by ONERA (French Aerospace Research Institute). This model underwent a series of wind tunnel tests under transonic conditions, with rich experimental data. Although the geometry of M6 wing is simple, the transonic flow involved is very complex, including local supersonic flow, shock wave and boundary layer separation. The flow around the M6 wing exhibits typical characteristics of three-dimensional compressible flow, which can be generated on the upper surface of the wing“ λ” Type shock waves are often chosen as validation examples for CFD software.

(3) Case of Impeller Machinery

This case is a centrifugal pump case, with a rotating speed of 1770 rpm and a working medium of water. The geometric shape is shown in the figure:

(4) Automobile case

This case is a calculation of the outflow field of DrivAer passenger cars, and there is a large amount of experimental data available for comparison. The calculation model is a three box passenger car with a smooth back and bottom, as shown in Figure 8. The inflow velocity is 30m/s, the moving wall velocity on the ground is 30 m/s, and the wheels are set with rotating wall boundary conditions, with a rotational speed of 94 rad/s.

Reference: 
1. Experimental Comparison of the Aerodynamic Behavior of Fastback and Notchback DrivAer Models. SAE Technical Paper 2014-01-0613, 2014

(5) Ship Cases

This case uses the VOF method in AICFD to numerically simulate the external flow field of a ship. An example in the field of ship application is Wigley Hull, which has a large amount of experimental data for comparison. The turbulence model is a k-omega SST model with a wall function, with a y+variation range of 30 to 150 and a Froude number of 0.267.

(6) Real time simulation case

This case is a three-dimensional Ahmed Body outflow field. The following is a comparison of the results when the tail tilt angle is 25.2 °.

The number of grids in this example is 198633, and the computational time for a certain CFD is 400 seconds (1000 steps for 4-core parallel computing, with a steady-state residual of 1e-4). The computational time for AICFD is 0.036 seconds. Real time simulation can be achieved through AICFD.