The Computational Fluid Dynamics code OVERFLOW includes as one of its solver options an algorithm which is a fairly small piece of code but which accounts for a significant portion of the total computational time. This paper studies some of the issues in accelerating this piece of code by using a Graphics Processing Unit (GPU). The algorithm needs to be modified to be suitable for a GPU and attention needs to be given to 64-bit and 32-bit arithmetic. Interestingly, the work done for the GPU produced ideas for accelerating the CPU code and led to significant speedup on the CPU.

中文翻译：

---

使用GPU加速CFD代码

计算流体动力学代码OVERFLOW包括一种算法，它是一种很小的代码，但它占了总计算时间的很大一部分，这是它的求解器选项之一。本文研究了使用图形处理单元（GPU）加速这段代码的一些问题。需要修改该算法以适合GPU，并且需要注意64位和32位算术。有趣的是，为GPU完成的工作产生了加速CPU代码的想法，并导致CPU的显着加速。