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Need help regarding geometry
Posted May 16, 2015, 5:59 a.m. EDT Geometry 2 Replies
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Hi
I am developing a continuous casting model of L-shaped channel. To make the geometrical structure of L-shape, I am facing problem in it. Do I have to make 2 blocks and combine them ? If yes, how ? or there is some other way to do this.
Regards
Shailesh
I am developing a continuous casting model of L-shaped channel. To make the geometrical structure of L-shape, I am facing problem in it. Do I have to make 2 blocks and combine them ? If yes, how ? or there is some other way to do this.
Regards
Shailesh
2 Replies Last Post May 26, 2015, 11:43 a.m. EDT
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Posted:
10 years ago
Hi
as you say you can draw two rectangles, you will add an internal boundary, but that dos really make your model more complex. If you absolutely want, you can unite the two geometrical objects (rectangles) and de-select the keep internal boundaries and your internal boundary will disappear
Another way: use the polyline, often its easier to sketch it out manually then to correct the coordinates of the points, provided the numbers are easy to identify
--
Good luck
Ivar
as you say you can draw two rectangles, you will add an internal boundary, but that dos really make your model more complex. If you absolutely want, you can unite the two geometrical objects (rectangles) and de-select the keep internal boundaries and your internal boundary will disappear
Another way: use the polyline, often its easier to sketch it out manually then to correct the coordinates of the points, provided the numbers are easy to identify
--
Good luck
Ivar
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Posted:
10 years ago
Thanks for the help. I have one more issue. Here it is -
I have been following instructions given for modelling of cylindrical rod (available on comsol website). As cylindrical rod simulation is done in 2-D, volume force is taken in 'r' and 'z' co-ordinates but I have to run it in 'x','y' and 'z'. I guess expression for 'z' will remain same here but no clue about 'x' and 'y'. Here what it is entered for cylindrical rod process (as per given in variables and parameters document uploaded on website)-
A_mush 6e4[kg/(m^3*s)] (Volume force damping constant)
alpha ht.alpha12 (Fraction of liquid phase)
epsilon 1e-3 (Volume force damping constant)
f (1-alpha)^2/(alpha^3+epsilon) ( Volume force prefactor)
Fr -f*A_mush*u (Volume force density, r-component)
Fz -f*A_mush*(w-v_cast) ( Volume force density, z-component)
v_cast = casting speed
u = velocity field
(no idea about w)
Kindly help me through this
Regards
Shailesh
I have been following instructions given for modelling of cylindrical rod (available on comsol website). As cylindrical rod simulation is done in 2-D, volume force is taken in 'r' and 'z' co-ordinates but I have to run it in 'x','y' and 'z'. I guess expression for 'z' will remain same here but no clue about 'x' and 'y'. Here what it is entered for cylindrical rod process (as per given in variables and parameters document uploaded on website)-
A_mush 6e4[kg/(m^3*s)] (Volume force damping constant)
alpha ht.alpha12 (Fraction of liquid phase)
epsilon 1e-3 (Volume force damping constant)
f (1-alpha)^2/(alpha^3+epsilon) ( Volume force prefactor)
Fr -f*A_mush*u (Volume force density, r-component)
Fz -f*A_mush*(w-v_cast) ( Volume force density, z-component)
v_cast = casting speed
u = velocity field
(no idea about w)
Kindly help me through this
Regards
Shailesh