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大力2010

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[求助] 请教高手 这个怎么展开???? 已有1人参与

请教高手 ,式 3-14怎么展开?

请教高手  这个怎么展开????
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zaq123321

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Seems problematic in 3-14. C is supposed to be scalar. But right side seems to be a vector. BTW, diffusion eq is a very basic Pde. You need to make sure each term is meaningful and then derive it. If u can post 2-55,2-56 eqs, it may help

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2楼2015-12-21 07:09:39
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大力2010

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2楼: Originally posted by zaq123321 at 2015-12-21 07:09:39
Seems problematic in 3-14. C is supposed to be scalar. But right side seems to be a vector. BTW, diffusion eq is a very basic Pde. You need to make sure each term is meaningful and then derive it. If ...

Ido not know free energy density of Al and Cu,can you help me ??,thank you
请教高手  这个怎么展开????-1
ty.jpg

3楼2015-12-21 09:08:19
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zaq123321

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Don't understand your question. Do you want to know how to get 3-14 from 2-55? Or you want to use 3-14 to do calculation and need some parameter? 2-55 makes sense but don't understand what's f_c and its relation to \partial f/\partial c. 3-14 seems still problematic and cannot figure out

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4楼2015-12-21 17:15:00
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大力2010

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4楼: Originally posted by zaq123321 at 2015-12-21 17:15:00
Don't understand your question. Do you want to know how to get 3-14 from 2-55? Or you want to use 3-14 to do calculation and need some parameter? 2-55 makes sense but don't understand what's f_c and  ...

the expression for f_c  is below equation 3-9, if I get equation (3-8) and (3-9),I can calculate , equation (3-8) and (3-9) can be got by fig 3.7, so if I get the value in fig 3.7 ,I can calculate all, do you have the free energy data for AL-Cu alloy?? I  need the free energy data of  AL-Cu alloy at different temperature.
请教高手  这个怎么展开????-2
3-2.jpg


请教高手  这个怎么展开????-3
3-3.jpg


请教高手  这个怎么展开????-4
3-4.jpg

5楼2015-12-21 17:50:07
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zaq123321

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Good. Now the last terms of 3-11,3-12 should be p'(\phi). Then the last term in 3-14 should be a vector with two components (\nabla  f_cx, \nabla f_cy)other than their summation. I still don't know what you want. You need functions p(phi) and phi and g(phi)?

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6楼2015-12-21 22:22:38
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大力2010

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6楼: Originally posted by zaq123321 at 2015-12-21 22:22:38
Good. Now the last terms of 3-11,3-12 should be p'(\phi). Then the last term in 3-14 should be a vector with two components (\nabla  f_cx, \nabla f_cy)other than their summation. I still don't know w ...

I  need the free energy data of  AL-Cu alloy at different temperature,,thermo-calc  can calculate the free energy,but  I do not have thermo-calc
7楼2015-12-22 08:47:08
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