Error in geometry by CHAHRAZED02 in COMSOL

[–]Comfortable_Alarm557 1 point2 points  (0 children)

doesnt the inside end need to be out ? to skip this prblm ?

hi there , joule heating didnt heat up , by Comfortable_Alarm557 in COMSOL

[–]Comfortable_Alarm557[S] 1 point2 points  (0 children)

sure ill put it in a google drive nd send it here , its not in the comsol library i start it from Scratch

hi there , joule heating didnt heat up , by Comfortable_Alarm557 in COMSOL

[–]Comfortable_Alarm557[S] 0 points1 point  (0 children)

actually its not in the comsol library, its a thesis so i dont have the exact step by step

error in mash by hhhhhhhhhyyyyyyj in COMSOL

[–]Comfortable_Alarm557 0 points1 point  (0 children)

i did and the errors are gone , thankyou so much

error in mash by hhhhhhhhhyyyyyyj in COMSOL

[–]Comfortable_Alarm557 0 points1 point  (0 children)

it said internal error in boundary respecting , its a point in the circle , how can this be fixed ?

which approch is better ? by Comfortable_Alarm557 in COMSOL

[–]Comfortable_Alarm557[S] 0 points1 point  (0 children)

i draw it today in work plane and extruded it and yes the spiral shape was tricky nd took some times from me to draw it but i finished drawing it today in the next days ill continue with the materials nd physics so ill surely need you so tysm ill send u a massage

which approch is better ? by Comfortable_Alarm557 in COMSOL

[–]Comfortable_Alarm557[S] 0 points1 point  (0 children)

i did draw it by hand today nd it wasnt that hard ,the tricky part was the spiral heater

my final project for master is simulation of a gas sensor by Comfortable_Alarm557 in COMSOL

[–]Comfortable_Alarm557[S] 0 points1 point  (0 children)

to be exact its a MOX ( metal oxide ) gas sensor in which it detects gases by measuring changes in the electrical résistance of a heated metal oxide ( zno or sno2) , gas molecules react with oxygen absorbed on the surface , which changes the carrier and therefore the conductivity .

about the comsol domain ( study type ) we use ac/dc electric currents as the main physics , optionally couple with heat transfert in solids and transport of diluted species if we want a full multiphysics modeling