Computer system for accelerating fluid simulation through collaboration between dpu and cpu

A computer system for accelerating fluid simulation through collaboration between a data processing unit (DPU) and a central processing unit (CPU), comprising one or more computing nodes, wherein the computing nodes communicate with each other via a network, and each computing node is configured with a same number of CPUs and DPUs;

• each computing node is provided with one or more than two CPUs, wherein a plurality of CPUs communicate with each other via internal connections, and the CPUs are configured to iteratively solve fluid simulation control equations and write iteration results to a memory;
• each computing node is provided with one or more than two DPUs, wherein each DPU uses a direct memory access controller to directly read memory data without passing through a CPU memory controller, to calculate and/or verify whether a residual of the iteration result satisfies a convergence criterion;
• and when the current iteration result satisfies the convergence criterion, the CPU completes an ongoing process of iterative solving, and the DPU calculates the residual of the iteration result, and performs post-processing and result output;
• the computer system accelerates fluid simulation algorithm solving through collaboration between the DPU and the CPU, and the following steps are comprised:
• S1:
• distributing a computational domain to each computing node, storing computational domain grids and physical quantities in the memory, and setting initial conditions and boundary conditions of the computational domain through the CPU in each computing node;
• S2:
• performing parallel fluid simulation computation by each computing node according to task allocation, wherein
• advancing time steps from initial conditions or computation results of the previous time step through the CPU, iteratively solving physical quantities in each time step and storing the physical quantities in the memory, reading boundary conditions and an iteration result in the memory through the DPU to calculate a residual and determine whether the residual satisfies the convergence criterion, and reading a convergence determination result of the DPU through the CPU;
• when the residual fails to satisfy the convergence criterion, continuing the iterative solving through the CPU;
• and when the residual satisfies the convergence criterion, completing an ongoing process of iterative solving, and calculating a residual of the iteration result through the DPU;
• and
• S3:
• performing post-processing and result output through the DPU, determining whether the time step is a last time step, otherwise, proceeding to a next time step, repeating the steps S2 and S3 in each time step until the last time step is achieved, and writing the physical quantities obtained by solving to a hard disk through the DPU.