[Lance]

Hi,
I have an application where the flow is entirely determined by wall motion, similar to an IC engine. First I run a dry-run solving only for the mesh motion, and remesh when the quality becomes too poor. I get a series of meshes that are then read in CFX when I compute the flow. I use the configuration/remeshing tab for this, with an external command that locates the correct mesh and replace the current mesh (as described in 33.2.2.1. User Defined Remeshing cfx_pre.pdf). My monitor for domain volume show the expected result (continuous smooth curve), but my monitor points for velocity inside the domain drop to zero for the time step after the mesh is replaced (time step 90 in figure). It is like the solution is not interpolated from time step 89 to 90.

Relevant CEL:
SIMULATION CONTROL:
&replace CONFIGURATION CONTROL:
CONFIGURATION: Configuration 1
Flow Name = Flow Analysis 1
ACTIVATION CONTROL:
CONTROL CONDITION: Activation Condition 1
Option = Start of Simulation
END
END
REMESH: Remesh 1
Activation Condition List = Interrupt Condition 1
External Command = ../read_mesh.sh
Location = FLUID1
Option = User Defined
Replacement Mesh File = cfxmesh.cfx5
END
END
END
END

Interrupt Condition 1 is true when time step = 89, i.e. one time step before my velocity drops. Do I need another configuration that starts when Configuration 1 end? I tried that by adding another configuration which had the setting ‘Initial values = Configuration 1 results’, but I could not get it to run. Im not even sure why I would need that.

Any ideas on why the velocity drops to zero and how I should proceed?