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Zero utilization of GPU despite being enabled

    • Muhammad Usman Shafique

      Hello everyone,

      I am trying to simulate flow through injector using VOF model with K-E RNG (swirl dominated flow) on FLUENT 2022 R2. I have distriburted my simulation on 3 PCs(Dell Precision Tower 7910)  using distrubted memory option in FLUENT. Specifications of PC's are as following:

      PC1: MEMORY=64GB, GEFORCE RTX 3090 (24GB) 28 cores

      PC2: MEMORY=64GB, GEFORCE RTX 3090 (24GB) 28 cores

      PC2: MEMORY=32GB, GEFORCE RTX 1660 (6GB) 16 cores

      Fluent is showing that the GPUs are being enabled but during simulation the GPU is not being utilized but only the CPU and Memory. I have also installed CUDA Version 12 for proper intgration but no success so far.  If anyone has any idea on how to resolve this issue, kindly let me know.

      I am also trying to introduce a new environment variable for proper utilization of GPUs on each device. Kindly tell if its the right approach.

    • Aniket
      Ansys Employee

      Fluent GPU solver is only available at Enterprise license level:

      If you have an enterprise license, please note the GPUs you have listed are not on list of supported ones:

      Graphics Cards Tested (


      How to access Ansys help links

      Guidelines for Posting on Ansys Learning Forum

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