{"id":169756,"date":"2023-05-15T08:32:46","date_gmt":"2023-05-15T08:32:46","guid":{"rendered":"\/knowledge\/forums\/topic\/in-the-cfx-documentation-it-is-stated-that-to-have-a-unique-time-step-for-energy-in-the-both-the-fluid-and-solid-domain-of-a-cht-simulation-the-values-must-be-set-using-ccl-these-values-cannot-be-ent\/"},"modified":"2023-07-31T12:28:53","modified_gmt":"2023-07-31T12:28:53","slug":"in-the-cfx-documentation-it-is-stated-that-to-have-a-unique-time-step-for-energy-in-the-both-the-fluid-and-solid-domain-of-a-cht-simulation-the-values-must-be-set-using-ccl-these-values-cannot-be-ent","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/in-the-cfx-documentation-it-is-stated-that-to-have-a-unique-time-step-for-energy-in-the-both-the-fluid-and-solid-domain-of-a-cht-simulation-the-values-must-be-set-using-ccl-these-values-cannot-be-ent\/","title":{"rendered":"In the CFX documentation It is stated that, to have a unique Time Step for energy in the both the fluid and solid domain of a CHT simulation the values must be set using CCL.These values cannot be entered in the GUI. Can you provide the syntax or an example of this?"},"content":{"rendered":"

To specify a certain time step for the fluid energy equation, but a different time step for the solid,submit an EQUATION CLASS CCL snippet at run time. This snippet goes in the Fluid Solver Control settings and looks as follows: FLOW: Flow Analysis 1 DOMAIN: WaterZone SOLVER CONTROL: EQUATION CLASS: energy CONVERGENCE CONTROL: Physical Timescale = 0.0005 [s] Timescale Control = Physical Timescale END END END END END The attached def file, CCL and .out file are an example of how to do this. Setting different time scales for equations also discussed in the CFX Help documentation at the link below: https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v192\/cfx_mod\/i1313401.html%23i1313663<\/p>\n

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