[Asphodel]

Hello everyone.

I'm using FLUENT 2024 to do a transient simulation about a diaphragm inside a tube which ruptures at 8 MPa.

At beginning, the boundary type of the diaphragm is set as wall through GUI, and I'd like to change it into interior when the vertex max pressure of the diaphragm reaches 8 MPa.

I did some research and wrote a scheme code in the “Calculation Activities - Execute Commands” module, but it did not seem to work. The code is given below.

It's my first time using scheme programming in FLUENT.

Thank you very much in advance.

Regards.

Asphodel

(rp-var-define' pres1 0.101325' real #f)
(define (change_bc_1)
(let ()
(rpsetvar 'pres1 (pick-a-real "/report/surface-integrals/vertex-max diaphragm1 () pressure no"))

(if (>= (rpgetvar 'pres1) 8)
(begin
(ti-menu-load-string "/define/boundary-conditions/zone-type diaphragm1 interior")
)
)
)
)

[Asphodel]

I figured it out. I set the monitor and named expression through GUI and used simplified scheme code to get it done.

(if(>(string->number (pick-robust"/define/named-expressions/compute expr1" 0.1)) 8)(ti-menu-load-string "/define/boundary-conditions/zone-type diaphragm1 interior"))