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3.2.4 Face Macros

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.


Table 3.2.20: Macro for Face Centroids Defined in metric.h
Macro Argument Types Outputs
F_CENTROID(x,f,t) real x[ND_ND], face_t f, Thread *t x (face centroid)

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.


Table 3.2.21: Macro for Face Area Vector Defined in metric.h
Macro Argument Types Outputs
F_AREA(A,f,t) A[ND_ND], face_t f, Thread *t A (area vector)

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.

Figure 3.2.1: ANSYS FLUENT Determination of Face Area Normal Direction: 2D Face
figure

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.


Jackie - Season 1 - Nurse

Jackie’s decision to hide her marriage from her colleagues is a literal and symbolic removal of her accountability .

Season 1 of Nurse Jackie challenges the audience's desire for a "likable" hero. It forces us to ask if a person can be "good" while being fundamentally . By the finale, the cracks in her facade begin to show, proving that while she can cure her patients, she is utterly unable to save herself . Nurse Jackie - Season 1

At the core of Season 1 is the tension between Jackie’s professional excellence and her personal collapse. She is the most competent person in All Saints Hospital, often bypassing and ethics to provide genuine care for her patients. However, this "Robin Hood" persona serves as a psychological shield . By saving lives, Jackie creates a "moral surplus" that she believes entitles her to her addiction. The show suggests that her empathy is real, but it is also the very thing that makes her deceptive . The Architecture of the Double Life Jackie’s decision to hide her marriage from her

The first season of Nurse Jackie is a masterclass in the , presenting a protagonist who is simultaneously a secular saint and a moral wreck . While many medical dramas focus on the high-stakes heroics of the ER, Jackie Peyton’s story is a deeper exploration of the erosion of identity through addiction and the justification of lies . The Paradox of the "Healer" By the finale, the cracks in her facade

Unlike many depictions of drug abuse that focus on "rock bottom," Season 1 portrays Jackie as a . To her, the Percocet and Vicodin aren't for partying; they are tools for survival. They allow her to endure the physical pain of her job and the emotional weight of her patients' suffering. The tragedy of the first season is the realization that Jackie isn't using drugs to escape her life—she is using them to sustain it. Conclusion

Her relationship with Eddie isn't born of love, but of necessity . He is her supplier, and their intimacy is a transaction disguised as an affair.This "compartmentalization" is her greatest skill and her greatest flaw, showing how addiction forces an individual to become a perpetual performer . Addiction as a Functional Tool

The season meticulously builds Jackie’s two worlds: the chaotic, drug-fueled reality of the hospital and the stable, unsuspecting life of her suburban family.


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.


Table 3.2.23: Macros for Interior and Boundary Face Flow Variables Defined in mem.h
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).


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