The ANSYS Fluent adjoint solver provides many opportunities to improve an initial design. There are three main challenges:
1. Converging the adjoint calculation
2. Applying design constraints
3. Automating the process to run many design iterations
Looking into the details of the solution can help users understand the impact of convergence issues and assess the reliability of optimization predictions. There are also additional options available in newer versions of Fluent. Design constraints like a limited design space or fixed surfaces can be a challenge even for experienced users. The tools to work with design conditions developed significantly over the last versions of Fluent. Although automation of design iterations is not yet available in the GUI, there are several possibilities available to automate the process and run several adjoint cycles consecutively.
1. General Introduction to the Fluent Adjoint solver
2.2. Divergence/Oscillations of Adjoint Residuals
2.3. Flat adjoint residuals
2.4. Inner and outer iterations
2.5. Stabilization schemes
2.6. Monitoring sensitivities
3.1. Working with fixed constraints
3.2. Order of constraints
4.1. Adjoint scheme script
4.2. Accessing the adjoint iteration number by script
4.3. Automatic shape optimization ACT
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Akram Radwan, Senior Technical Support Engineer
Akram received his German Diploma (FH) degree in process engineering from the University of Applied Sciences Mannheim in 2004 on the simulation of heat transfer of high-viscous liquids. He then received his M.Sc. degree in 2007 from the University of Applied Sciences Mannheim and the University of Mannheim on the investigation of the applicability of FSI simulations for the institute of process and fluid simulation of the University of Applied Sciences.
Akram joined ANSYS Germany in 2011 as a technical support engineer. He had several roles within the ACE organization that include internal and external technical support, training and knowledge materials. Currently, he provides technical support and training for ANSYS customers and channel partners. His focus areas are pre-processing, multiphase flows, dynamic mesh, user-defined functions and adjoint optimization with ANSYS Fluent.