/ ***********************************************************************

UDF for specifying steady-state parabolic pressure profile boundary

profile for a turbine vane

************************************************************************/

#include "udf.h"

DEFINE_PROFILE(pressure_profile,t,i)

{

real x[ND_ND]; / * this will hold the position vector */

real y;

face_t f;

begin_f_loop(f,t)

{

F_CENTROID(x,f,t);

y = x[1];

F_PROFILE(f,t,i) = 1.1e5 - y*y/(.0745*.0745)*0.1e5;

}

end_f_loop(f,t)

我们将上面的UDF源代码存为prepare.c

我们启动Fluent

然后我们直接编译我们刚才保存的prepare.c

我们打开Visual Studio（我是Visual Studio 2013英文版）

#include / *包含输入输出流头文件*/

using namespace std;

/ *一定要这样写，以c语言的形式导出，在Fluent当中才能识别*/

extern "C" __declspec(dllexport) void CppDynamicLinkLibrary()

{

cout << "Hello Fluent" << endl; / *输出“Hello Fluent”*/

#include "udf.h"

/ *链接我们刚才动态链接库的函数*/

extern void CppDynamicLinkLibrary();

/ *******************************************

*我们在每次迭代完成以后，

*用动态链接库中的函数输出一次“Hello Fluent”

********************************************/

DEFINE_ADJUST(my_adjust,d)

{

CppDynamicLinkLibrary(); / *调用动态链接库中的函数*/

将源代码也保存为prepare.c

然后前面动态链接库项目文件夹下

重新打开Fluent

导入网格，设置好各种求解参数

加载刚才编译的UDF（注意：此处只需要加载（Load），而不需要编译（Build）了！见截图）

求解运行算例

附：

makefile文件的注释说明

###########################################################

##

## Copyright 2003-2011 ANSYS, Inc.

## All Rights Reserved

##

###########################################################

#

# purpose:

#    This file is the makefile for NT UDF builds.

#

# usage:

#    Change file name 'makefile_nt.udf' to 'makefile'.

#    Place the makefile file in the target dir.

#    Place the helper file 'user_nt.udf' in same directory.

#    Edit user_nt.udf file.

#    Execute an 'nmake'  (no arguments needed).

#

# notes:

#    The user should not need to change this file.

#    The following macros are expected to be in the user_nt.udf file:

#      SOURCES, VERSION, PARALLEL_NODE and USER_OBJECTS.

#    The macro FLUENT_LIB is automatically defined here based on VERSION

#      and PARALLEL_NODE.

#    Only this makefile and the helper file 'user_nt.udf' needs to be

#      the target dir, all other files are automatically generated,

#      and removed in an 'nmake clean'.

#    The source file is expected in ..\..\src directory.

#    Make sure the VC compiler is set up for command line mode, use

#      the file Vcvars32.bat from Visual Studio to assist this.

#    This makefile uses the public domain program 'sed', make sure

#      sed is in your executable path.

#    The '^' char in the SRC literal is a quote for the '\' char,

#      otherwise interpretted as a line continuation char.

#    Use the 'nmake clean' command to restart builds.

###########################################################

#包含user_nt.udf文件

!INCLUDE user_nt.udf

# These need to be updated for each release.

LIB_RELEASE=1800

RELEASE=18.0.0

# If a local path can be found, use it

!IF (("$(FLUENT_INC_LOCAL_RESERVED)" != "") && ("$(FLUENT_INC)" == ""))

FLUENT_INC = $(FLUENT_INC_LOCAL_RESERVED)

!ENDIF

# it is assumed $(FLUENT_INC)is already set.

!IF !DEFINED(FLUENT_INC)

!  ERROR You need to define the environmental variable FLUENT_INC.

!ENDIF

!IF !DEFINED(FLUENT_ARCH)

!IF ("$(PROCESSOR_ARCHITECTURE)" == "ALPHA")

FLUENT_ARCH = ntalpha

!ENDIF

!IF ("$(PROCESSOR_ARCHITECTURE)" == "x86")

FLUENT_ARCH = ntx86

!ENDIF

!IF ("$(PROCESSOR_ARCHITECTURE)" == "AMD64")

FLUENT_ARCH = win64

!ENDIF

!IF ("$(PROCESSOR_ARCHITEW6432)" == "AMD64")

!  MESSAGE You seem to be working on a 64-bit machine, but in a 32-bit build environment.

!  MESSAGE If you really want to build the UDF for the "ntx86" FLUENT_ARCH, then please

!  MESSAGE set the "FLUENT_ARCH" environment variable to "ntx86" before calling this.

!  ERROR   Aborting.

!ENDIF

!ENDIF

# set FLUENT_LIB based on VERSION macro

!IF (("$(VERSION)" == "2d") || ("$(VERSION)" == "3d") || \

("$(VERSION)" == "2ddp") || ("$(VERSION)" == "3ddp"))

FLUENT_LIB = fl$(LIB_RELEASE).lib

LIBS = /Libpath:"$(FLUENT_INC)"\fluent$(RELEASE)\$(FLUENT_ARCH)\$(VERSION)

!ENDIF

!IF (("$(VERSION)" == "2d_host") || ("$(VERSION)" == "3d_host") || \

("$(VERSION)" == "2ddp_host") || ("$(VERSION)" == "3ddp_host"))

COMM = net

FLUENT_LIB =  mport.lib fl$(LIB_RELEASE).lib

LIBS = /Libpath:"$(FLUENT_INC)"\fluent$(RELEASE)\$(FLUENT_ARCH)\$(VERSION)  /Libpath:"$(FLUENT_INC)"\fluent$(RELEASE)\multiport\$(FLUENT_ARCH)\$(COMM)\shared

!ENDIF

!IF (("$(VERSION)" == "2d_node") || ("$(VERSION)" == "3d_node") || \

("$(VERSION)" == "2ddp_node") || ("$(VERSION)" == "3ddp_node"))

!IF (("$(PARALLEL_NODE)" != "none") && ("$(PARALLEL_NODE)" != "net"))

PARALLEL_NODE = mpi

!ENDIF

COMM = mpi

FLUENT_LIB =  mport.lib fl_$(PARALLEL_NODE)$(LIB_RELEASE).lib

LIBS = /Libpath:"$(FLUENT_INC)"\fluent$(RELEASE)\$(FLUENT_ARCH)\$(VERSION)  /Libpath:"$(FLUENT_INC)"\fluent$(RELEASE)\multiport\$(FLUENT_ARCH)\$(COMM)\shared

!ENDIF

###########################################################

#定义变量SRC，其中^表示回车符成为字符串的一部分，其实就是表示字符串..\..\src\

SRC = ..\..\src^\

#使用vc的编译器

CC = cl

#CFLAGS用来指定头文件的路径

# compile flags

#  /c for compile only,  /Za for ansi c and __STDC__ is set

CFLAGS = /c /Za /DUDF_EXPORTING /DUDF_NT /DWIN64

#目标文件为libudf.dll动态链接库

TARGET = libudf.dll

UDFDATA = udf_names.c

# generate object names from source names

#".cpp=.obj"的意思是做一个替换

#把变量比如$CSOURCES,$SOURCES2,$SRC_OBJECT,$UDFDATA

#所有的[.cpp]的字符串转换为[.obj]字符串

SOURCES2 = $(CSOURCES:..\..\src\=) #这里实际上就是test.c

SRC_OBJECT = $(SOURCES2:.cpp=.obj) #这里实际上如果是cpp文件就是test.obj，否则默认不发生变化

SRC_OBJECT = $(SRC_OBJECT:.c=.obj)#这里如果是c文件就是test.obj

UDF_OBJECT = $(UDFDATA:.c=.obj)  #这里实际上是udf_name.obj

OBJECTS = $(UDF_OBJECT) $(SRC_OBJECT) $(USER_OBJECTS) #

#此处为包含的头文件

INCLUDES= -I. \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\$(FLUENT_ARCH)\$(VERSION) \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\main \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\addon-wrapper \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\io \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\species \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\pbns \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\numerics \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\sphysics \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\storage \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\mphase \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\bc \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\models \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\material \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\amg \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\util \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\mesh \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\udf \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\ht \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\dx \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\turbulence \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\parallel \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\etc \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\ue \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\dpm \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\src\dbns \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\cortex\src \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\client\src \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\tgrid\src \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\multiport\src \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\multiport\mpi_wrapper\src

GPU_LIB=

!IF ("$(GPU_SUPPORT)" == "on") #如果开启了GPU加速，那么久将GPU的头文件也包含到INCLUDE里面，默认为off的

INCLUDES = $(INCLUDES) \

-I"$(FLUENT_INC)"\fluent$(RELEASE)\multiport\gpu_wrapper\include

GPU_LIB = OpenCL.lib

LIBS = $(LIBS) /Libpath:"$(FLUENT_INC)"\fluent$(RELEASE)\multiport\gpu_wrapper\$(FLUENT_ARCH)\stub

!ENDIF

default:   $(TARGET) #假想目标，每次更新$(TARGET)即libudf.dll

$(UDF_OBJECT): $(UDFDATA) #从udf_name.c编译生成目标文件udf_name.obj

$(CC) $(CFLAGS) $(INCLUDES)  $**

#采用cl编译器 替换(编译但不链接 禁用语言扩展 定义预处理器) 包含头文件 编译所有的文件

$(SRC_OBJECT): $(CSOURCES) #从test.c编译生成目标文件test.obj

@echo # Generating ud_io1.h

resolve.exe -udf $(CSOURCES) -head_file ud_io1.h

$(CC) $(CFLAGS) $(INCLUDES)  $**

#采用cl编译器 替换(编译但不链接 禁用语言扩展 定义预处理器) 包含头文件 编译所有的文件

$(TARGET): makefile user_nt.udf $(UDF_OBJECT) $(SRC_OBJECT)  #生成目标文件libudf.dll

@echo # Linking $@ because of $?

link  $(LIBS) /dll   /out:$(TARGET) \    #/dll表示生成dll文件

$(OBJECTS)  $(FLUENT_LIB) $(GPU_LIB) #需要链接文件

$(UDFDATA): makefile $(SRC_OBJECT)

#自动生成udf_name.c文件

@echo # Generating $@ because of $?

@echo > $@

@echo >> $@

@echo #include "udf.h" >> $@

@echo #include "prop.h" >> $@

@echo #include "dpm.h" >> $@

@sed -n "s/^ *\(DEFINE_[_A-Z]*(.*)\)/extern \1;/p" $(CSOURCES) >> $@

@echo __declspec(dllexport) UDF_Data udf_data[] = { >> $@

@sed -n "s/^ *DEFINE_\([_A-Z]*\)( *\([_a-zA-Z0-9]*\).*)/\{\"\2\", (void (*)(void))\2, UDF_TYPE_\1\},/p" $(CSOURCES) >> $@

@echo }; >> $@

@echo __declspec(dllexport) int n_udf_data = sizeof(udf_data)/sizeof(UDF_Data); >> $@

@echo #include "version.h" >> $@

@echo __declspec(dllexport) void UDF_Inquire_Release(int *major, int *minor, int *revision) >> $@

@echo { >> $@

@echo   *major = RampantReleaseMajor; >> $@

@echo   *minor = RampantReleaseMinor; >> $@

@echo   *revision = RampantReleaseRevision; >> $@

@echo } >> $@

#清理输出文件

clean:

@del  *.dll *.obj *.ilk *.exp *.lib *.pdb *.c

tellfluentarch:

@echo FLUENT_ARCH: $(FLUENT_ARCH)

@echo PROCESSOR_ARCHITECTURE: $(PROCESSOR_ARCHITECTURE)

@echo PROCESSOR_ARCHITEW6432: $(PROCESSOR_ARCHITEW6432)

$(OBJECTS): $(HSOURCES)