UDF函数求助

[zhanggz24]

请问大家，图片中的三个函数是什么意思？为什么UDF中有这三个函数，不能编译进入fluent？有什么解决办法吗？

[bestucan]

ansys fluent udf manual.pdf
搜你的版本的ansys的这个文件，里面有解释和使用范例

[zhanggz24]

@bestucan 官方帮助文件里只有案例中使用了这个函数，但是没有解释说明。

[mithraLa]

有些udf确实从来没给过 只能照着字面意思猜。而且ansys特别爱改udf命名。可能这几个宏已经完全不存在了。第三个应该是求导。

[bestucan]

这些是内部函数，只有头文件里有声明。是常见的商业软件保密方法。（只发布头文件和源代码编译成的动态链接库）

如果要使用，

第一步，包含定义该函数的头文件
第二步，编译的时候链接到包含该函数定义的动态链接库。

可以使用grep找到包含该函数的声明头文件和各状况下的动态链接库。

can@M320:/ansys_inc> sudo grep -r Alloc_Storage_Vars . 
grep: ./v231/fluent/fluent23.1.0/linmic/3ddp_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/linmic/2ddp_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/linmic/2d_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/linmic/3d_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/3ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/2ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/3d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/2d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/2d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/2ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mhd/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/msmdbatt/lnamd64/3ddp_node/cae_batt.o: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/msmdbatt/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/msmdbatt/lnamd64/3d_node/cae_batt.o: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/msmdbatt/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/htc/lnamd64/3ddp_node/libhtcns.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/htc/lnamd64/2ddp_node/libhtcns.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/htc/lnamd64/2d_node/libhtcns.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/htc/lnamd64/3d_node/libhtcns.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/fensapice/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/fensapice/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/3ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/2ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/3d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/2d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/2d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/2ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/rom/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/3ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/2ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/3d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/2d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/2d_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/2ddp_host/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/adjoint/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mpm/lnamd64/3ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mpm/lnamd64/2ddp_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mpm/lnamd64/2d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/addons/mpm/lnamd64/3d_node/libudf.so: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/3ddp_host/fluent.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/3ddp_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/2ddp_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/3d_host/fluent.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/2d_node/fluent_mpi.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/2d_host/fluent.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/2ddp_host/fluent.23.1.0: binary file matches
grep: ./v231/fluent/fluent23.1.0/lnamd64/3d_node/fluent_mpi.23.1.0: binary file matches
./v231/fluent/fluent23.1.0/src/storage/storage.h:FLUENT_EXPORT void Alloc_Storage_Vars(Domain *, ...);
./v231/fluent/fluent23.1.0/src/storage/storage.h:FLUENT_EXPORT void MD_Alloc_Storage_Vars(Domain *, ...);

[西湖冷月]

@bestucan 厉害，第一次知道这种用法！