welcome to discuss how to use Flac3d to solve THM problem!

hh199422

I didnt make any calculation about low temperature. I dont know whether I can help you.anyway I will try my best.

A suggestion: GEOSLOPE could do this better than FLAC3D for low temperature field sumulation(my opinion). however it is 2d.

glj264

I think this field need many industrous person like as Mr lai. I don't konw this person, but I read his resume, I feel that I  should do toward to him way. I believe myself. I also know Mr leoflyone , I like to make friend with you.  I often  like to write in English, Do you mind ?
Thanks

hh199422

1. flac3d cannot take into the freezing problem account becourse the swelling behavoir of the water under 0 census degree. and the conversion of the phase of water cannot be dealed with this code now.
2. In theory you are right. however for most of the geotechincal engineering, there is no problem because the hydro-mechnical process indeuce very small changes and it could be neglected.
3.my opinon is that when the mechnical step begins the "real time(thermal or hydraulic)" will stop util the mecahnical balance is achieved. So I dont think there is problem.
4. I have no D edition of Geoslope.

maybe you caould ask more about this question to 赖远明. from the resume, he should be an expert! if there is chance I also want to ask for him some question.

hh199422

yes. it is the  swellling behavoir of ice.
I know what you mean. in fact we could modify some variables via Fish, but I dont know the exact relations (if you know, could you tell) between the ice and water in many aspect.

As to ANSYS , I know a little about its function on this aspect. Geoslope should  be a  "not bad choice" for freezing problem.  there are some description how to simulatie the variation of temperature in the base of a subway.

I dont know its capaility to coupled probelm. you could try it!

it could be take into account of the phase change

hh199422

if you just want to simulate the temperature feild, I consider FLAC3D is ok.

IF you want to solve the coupled problem of soil or rock mass under low temperature condition, I am not sure. however, according to the theory, it is not very proper for this.

all the opinion is only for reference!

hh199422

to leoflyone,

anyways thank you firstly!

If you dont mind, send it to my email.

at present, I am doing research about thermo-hydro-mechanical problem of nuclear waste repository with different codes.

up to now I found the coupled problem is so important to geotechnical engineering.

i am also glad to discuss with you.

lidiyuan123

admire and admire again!

glj264

好的，你发给我吧。谢谢你了leoflyone ，我的信箱：glj_jacky@sohu.com

hh199422

A reference:

when you make the THM calculation, the initial state is very very important, especially for the correct simulation of pore pressure!

generally speaking, the thermal calculation is easier than HM calculation

A suggestion: before you make any calculation, you should test it and check the results carefully!

ocat

呵呵
能不能介绍一下国内及国外在这方面的研究情况?比如国内有哪些学校和老师在做这方面的研究.让我们这些外行也了解了解

love21999

大家还真厉害呀!

shanghaizqs

我现在也在学习三场耦合，其中温度场是低温场，我刚开始学习FLAC3D，里面好象只说三场中的两场可以耦合。没提三场，楼上各位知道可以三场耦合吗。

hh199422

shanghaizqs wrote:
我现在也在学习三场耦合，其中温度场是低温场，我刚开始学习FLAC3D，里面好象只说三场中的两场可以耦合。没提三场，楼上各位知道可以三场耦合吗。

可以做三场耦合!不过对于低温条件下渗流场的模拟(包括相变)应该要有很好的理论研究,其计算成果才相对可信.单纯用Flac现有理论还是不能很好解释相变过程中的很多现象的!

仅供参考!欢迎探讨!