![[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.
In interviews, she’s described prom as — the music, the lights, the nervous excitement before walking into a room full of expectations. That energy never left her. Whether she’s on set, at a convention, or filming a casual vlog, there’s a sparkle in her eye that says, “This moment matters.”
So next time you watch her on screen, remember: behind that effortless smile is a young woman who once fixed her corsage, practiced her lines in a mirror, and decided that life — like prom — is worth showing up for in full glamour. melody marks prom night pussy practice
She’s spoken about loving the ritual of prom: picking the perfect outfit, doing her own makeup, the group photos, the first slow dance. That same ritualism shows up in how she approaches a shoot day — from choosing the right vibe to warm‑up routines that feel like getting ready for a high school dance. In interviews, she’s described prom as — the
Here’s a long, detailed post capturing the of Melody Marks — written in the style of a fan tribute or pop culture deep dive. Melody Marks: Prom Night, Practice Lifestyle & The Art of Entertainment When you think of rising stars who blend small‑town charm with big‑screen ambition, Melody Marks stands out like a spotlight at dusk. Known for her radiant smile, relentless work ethic, and an almost cinematic ability to command attention, Melody has quietly built a lifestyle that mirrors the most exciting parts of youth culture: the thrill of prom night, the discipline of practice, and the magic of entertainment. She’s spoken about loving the ritual of prom:
Let’s break down the three pillars that define her world. For Melody, every project feels like prom night. Why? Because she brings the same electric anticipation, the same careful preparation, and the same “once in a lifetime” joy to her work.
But she also takes entertainment seriously as an escape. In a chaotic world, Melody believes her job is to offer : beauty and relief. Whether through a heartfelt scene or a silly TikTok dance, she wants you to forget your worries for a few minutes. The Big Picture – A Star Who Prepares & Plays Melody Marks isn’t just a name on a poster. She’s a reminder that the best entertainers are the ones who still get butterflies — and then channel them into magic.
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
