![[ANSYS, Inc. Logo]](https://www.afs.enea.it/project/neptunius/docs/fluent/html/udf/fluentlogo.gif)
|
|
|
The macros listed in Table 3.2.20- 3.2.23 can be used to return real face variables in SI units. They are identified by the F_ prefix. Note that these variables are available only in the pressure-based solver. In addition, quantities that are returned are available only if the corresponding physical model is active. For example, species mass fraction is available only if species transport has been enabled in the Species Model dialog box in ANSYS FLUENT. Definitions for these macros can be found in the referenced header files (e.g., mem.h).
Face Centroid (
F_CENTROID)
The macro listed in Table 3.2.20 can be used to obtain the real centroid of a face. F_CENTROID finds the coordinate position of the centroid of the face f and stores the coordinates in the x array. Note that the x array is always one-dimensional, but it can be x[2] or x[3] depending on whether you are using the 2D or 3D solver.
The ND_ND macro returns 2 or 3 in 2D and 3D cases, respectively, as defined in Section 3.4.2. Section 2.3.15 contains an example of F_CENTROID usage.
Face Area Vector (
F_AREA)
F_AREA can be used to return the real face area vector (or `face area normal') of a given face f in a face thread t. See Section 2.7.3 for an example UDF that utilizes F_AREA.
By convention in ANSYS FLUENT, boundary face area normals always point out of the domain. ANSYS FLUENT determines the direction of the face area normals for interior faces by applying the right hand rule to the nodes on a face, in order of increasing node number. This is shown in Figure 3.2.1.
ANSYS FLUENT assigns adjacent cells to an interior face ( c0 and c1) according to the following convention: the cell out of which a face area normal is pointing is designated as cell C0, while the cell in to which a face area normal is pointing is cell c1 (Figure 3.2.1). In other words, face area normals always point from cell c0 to cell c1.
Flow Variable Macros for Boundary Faces
The macros listed in Table 3.2.22 access flow variables at a boundary face.
The origins of Deviantdavid are shrouded in mystery, with little to no information available about their early life or background. It is unclear where Deviantdavid is from or what their real name is. The only clue lies in their online presence, which suggests that they have been active on various platforms for several years.
The impact of Deviantdavid on their online audience cannot be overstated. They have managed to build a loyal following, with many fans hanging onto their every word. Their influence extends beyond their online presence, with many citing them as a source of inspiration and motivation.
In the vast expanse of the internet, there exist numerous individuals who have managed to carve out a niche for themselves, often shrouded in mystery and intrigue. One such enigmatic figure is Deviantdavid, a name that has been making waves online, leaving many to wonder who this person is and what they are all about. Deviantdavid
In conclusion, Deviantdavid is an enigmatic figure who has managed to build a significant online presence through their unique content and unapologetic perspective. While their impact on their audience is undeniable, their critics raise important questions about the role of provocative content in online discourse. As we continue to navigate the complexities of the online world, it will be fascinating to see how Deviantdavid continues to evolve and shape the conversation.
Deviantdavid’s rise to prominence can be attributed to their unique and often provocative content, which has resonated with a significant online audience. Their posts, often laced with humor, satire, and social commentary, have captured the attention of many, who find themselves drawn to their unapologetic and unconventional perspective. The origins of Deviantdavid are shrouded in mystery,
Deviantdavid’s online presence is multifaceted, with a strong presence on various social media platforms, including Twitter, YouTube, and Reddit. Their Twitter feed is a treasure trove of witty one-liners, humorous observations, and incisive commentary on current events. Their YouTube channel features a range of videos, from vlogs to podcasts, where they discuss topics ranging from politics and social justice to pop culture and personal anecdotes.
However, not everyone is a fan of Deviantdavid. Some have criticized their content as being too provocative, insensitive, or even hurtful. Others have accused them of being a troll or a provocateur, seeking to stir up controversy and attention. The impact of Deviantdavid on their online audience
As the online landscape continues to evolve, it will be interesting to see how Deviantdavid adapts and continues to engage with their audience. Will they continue to push the boundaries of what is considered acceptable online, or will they tone down their content to appeal to a broader audience? Only time will tell.
See Section 2.7.3 for an example UDF that utilizes some of these macros.
Flow Variable Macros at Interior and Boundary Faces
The macros listed in Table 3.2.23 access flow variables at interior faces and boundary faces.
| Macro | Argument Types | Returns |
| F_P(f,t) | face_t f, Thread *t, | pressure |
| F_FLUX(f,t) | face_t f, Thread *t | mass flow rate through a face |
F_FLUX can be used to return the real scalar mass flow rate through a given face f in a face thread t. The sign of F_FLUX that is computed by the ANSYS FLUENT solver is positive if the flow direction is the same as the face area normal direction (as determined by F_AREA - see Section 3.2.4), and is negative if the flow direction and the face area normal directions are opposite. In other words, the flux is positive if the flow is out of the domain, and is negative if the flow is in to the domain.
Note that the sign of the flux that is computed by the solver is opposite to that which is reported in the ANSYS FLUENT GUI (e.g., the Flux Reports dialog box).
Previous:
3.2.3 Cell Macros
