SimModeler - Revision history

Moam3950 at 23:28, 14 May 2025

2025-05-14T23:28:33Z

Moam3950 at 19:05, 14 May 2025

2025-05-14T19:05:19Z

Conrad54418: /* Compressible */

2025-01-29T20:42:32Z

‎Compressible

Conrad54418: /* Compressible */

2025-01-29T20:33:34Z

‎Compressible

Conrad54418: /* Incompressible */

2025-01-29T20:33:23Z

‎Incompressible

Conrad54418 at 16:21, 14 August 2023

2023-08-14T16:21:55Z

Skinnerr: /* Boundary conditions */

2017-03-10T20:31:17Z

‎Boundary conditions

Skinnerr: add common boundary conditions for incompressible case

2017-03-10T20:20:59Z

add common boundary conditions for incompressible case

Mkm06: /* Converting old files */

2015-02-20T17:42:26Z

‎Converting old files

Kjansen: /* Creating new files */

2014-08-14T19:16:20Z

‎Creating new files

@@ Line 68: / Line 68: @@
 **scalar_1 (zero)
 **turbulence wall (value unimportant; use zero)
-*Impermeable slip walls
+*Impermeable slip walls/symmetry boundary condition
 **Comp 1 (zero in wall-normal direction)
 **scalar_1 flux (zero)
@@ Line 100: / Line 100: @@
 **temperature or heat flux
-*Impermeable slip walls
+*Impermeable slip walls/symmetry boundary condition
 **Comp 1 (zero in wall-normal direction)
 **scalar_1 flux (zero)
 **traction vector (zero vector)
 **heat flux (zero)

@@ Line 38: / Line 38: @@
 Commonly boundary conditions include:
-*comp3 - Specifies a 3D velocity vector
+*comp3 for inflow- Specify a 3D velocity vector. Set vector magnitude to the free-stream velocity you want, set the vector direction to match the intended flow direction.
 *comp1 - Specifies a 3D vector in which the velocity is constrained. Velocity normal to this vector is not directly affected. This is useful for creating slip walls and mimicking free stream regions.
 *temperature - Sets the temperature of the wall. This is only needed for compressible cases.
 *scalar_1 - Sets the scalar_1 / eddy viscosity to apply at a wall. For the Spalart Allmaras models, scalar_1 should be zero at physical walls where a boundary layer develops and 3 to 5 times the molecular viscosity at free stream boundaries (http://turbmodels.larc.nasa.gov/spalart.html)
 *surf ID - Associates a number with one or more faces. This can then be read by Phasta and used to apply more complicated boundary conditions in software.
-*natural pressure - Apply a mean pressure over a surface. The pressure at any particular point is still allowed to vary (someone verify).
+*natural pressure - Apply a mean pressure over a surface. The pressure at any particular point is still allowed to vary.
-*traction vector - ??. The zero vector is typically applied at outlet.
+*traction vector -. The zero vector is typically applied at outlet.
-*heat flux - Specifies the rate at which heat is injected / removed (not sure which one) into / from the fluid domain. The value is almost always set to zero to create a perfectly insulated boundary.
+*heat flux - Specifies the rate at which heat is injected / removed into / from the fluid domain. The value is almost always set to zero to create a perfectly insulated boundary.
-*scalar_1 flux - set the flux of scalar_1 / eddy viscosity into / out of the domain (not sure which one). This is typically only used at outlets where high values of eddy viscosity have been convected downstream of turbulent walls. The value is almost always set to zero.
+*scalar_1 flux - set the flux of scalar_1 / eddy viscosity into / out of the domain. This is typically only used at outlets where high values of eddy viscosity have been convected downstream of turbulent walls. The value is almost always set to zero.
-*turbulence wall - Indicates that a surface is to be included in the calculation of d2wall files (verify) which are then used by the Spalart Allmaras turbulence model to generate more physical turbulent kinetic energy production / dissipation budgets.
+*turbulence wall - Indicates that a surface is to be included in the calculation of d2wall files which are then used by the Spalart Allmaras turbulence model to generate more physical turbulent kinetic energy production / dissipation budgets.
 === Incompressible ===
@@ Line 64: / Line 65: @@
 **traction vector (zero vector)
 *Solid physical walls
-**Comp 3 (zero vector)
+**Comp 3
 **scalar_1 (zero)
 **turbulence wall (value unimportant; use zero)
@@ Line 94: / Line 95: @@
 *Solid physical walls
-**Comp 3 (zero vector)
+**Comp 3
 **scalar_1 (zero)
 **turbulence wall (value unimportant; use zero)

← Older revision		Revision as of 20:42, 29 January 2025
Line 98:		Line 98:
	**turbulence wall (value unimportant; use zero)		**turbulence wall (value unimportant; use zero)
	**temperature or heat flux		**temperature or heat flux
		+
		+	*Impermeable slip walls
		+	**Comp 1 (zero in wall-normal direction)
		+	**scalar_1 flux (zero)
		+	**traction vector (zero vector)
		+	**heat flux (zero)

@@ Line 78: / Line 78: @@
 *Initial conditions
 **initial velocity (nonzero, typically small)
-**initial scalar_1 (3-5 times free-stream molecular viscosity)
+**initial scalar_1 (3-5 times free-stream kinematic viscosity)
 **initial pressure
 **initial temperature
@@ Line 84: / Line 84: @@
 *Inflow
 **Comp 3
-**scalar_1 (also 3-5 times free-stream molecular viscosity)
+**scalar_1 (also 3-5 times free-stream kinematic viscosity)
 **temperature
 **pressure

@@ Line 55: / Line 55: @@
 *Initial conditions
 **initial velocity (nonzero, typically small)
-**initial scalar_1 (3-5 times free-stream molecular viscosity)
+**initial scalar_1 (3-5 times free-stream kinematic viscosity)
 *Inflow
 **Comp 3
-**scalar_1 (also 3-5 times free-stream molecular viscosity)
+**scalar_1 (also 3-5 times free-stream kinematic viscosity)
 *Outflow
 **natural pressure (zero)

← Older revision		Revision as of 20:31, 10 March 2017
Line 71:		Line 71:
	**scalar_1 flux (zero)		**scalar_1 flux (zero)
	**traction vector (zero vector)		**traction vector (zero vector)
		+
		+	=== Compressible ===
		+
		+	Common BCs used for a compressible case with the S-A turbulence model
		+
		+	*Initial conditions
		+	**initial velocity (nonzero, typically small)
		+	**initial scalar_1 (3-5 times free-stream molecular viscosity)
		+	**initial pressure
		+	**initial temperature
		+
		+	*Inflow
		+	**Comp 3
		+	**scalar_1 (also 3-5 times free-stream molecular viscosity)
		+	**temperature
		+
		+	*Outflow
		+	**(?) pressure or natural pressure (zero)
		+	**scalar_1 flux (zero)
		+	**traction vector (zero vector)
		+	**heat flux (zero)
		+
		+	*Solid physical walls
		+	**Comp 3 (zero vector)
		+	**scalar_1 (zero)
		+	**turbulence wall (value unimportant; use zero)
		+	**temperature or heat flux

← Older revision		Revision as of 20:20, 10 March 2017
Line 48:		Line 48:
	*scalar_1 flux - set the flux of scalar_1 / eddy viscosity into / out of the domain (not sure which one). This is typically only used at outlets where high values of eddy viscosity have been convected downstream of turbulent walls. The value is almost always set to zero.		*scalar_1 flux - set the flux of scalar_1 / eddy viscosity into / out of the domain (not sure which one). This is typically only used at outlets where high values of eddy viscosity have been convected downstream of turbulent walls. The value is almost always set to zero.
	*turbulence wall - Indicates that a surface is to be included in the calculation of d2wall files (verify) which are then used by the Spalart Allmaras turbulence model to generate more physical turbulent kinetic energy production / dissipation budgets.		*turbulence wall - Indicates that a surface is to be included in the calculation of d2wall files (verify) which are then used by the Spalart Allmaras turbulence model to generate more physical turbulent kinetic energy production / dissipation budgets.
		+
		+	=== Incompressible ===
		+
		+	Common BCs used for an incompressible case with the S-A turbulence model
		+
		+	*Initial conditions
		+	**initial velocity (nonzero, typically small)
		+	**initial scalar_1 (3-5 times free-stream molecular viscosity)
		+	*Inflow
		+	**Comp 3
		+	**scalar_1 (also 3-5 times free-stream molecular viscosity)
		+	*Outflow
		+	**natural pressure (zero)
		+	**scalar_1 flux (zero)
		+	**traction vector (zero vector)
		+	*Solid physical walls
		+	**Comp 3 (zero vector)
		+	**scalar_1 (zero)
		+	**turbulence wall (value unimportant; use zero)
		+	*Impermeable slip walls
		+	**Comp 1 (zero in wall-normal direction)
		+	**scalar_1 flux (zero)
		+	**traction vector (zero vector)

@@ Line 26: / Line 26: @@
 From your case, make a new directory and copy your parasolid (.x_t or .xmt_txt), and .spj file into it. Rename the parasolid file to geom.xmt_txt and the .spj file to geom.spj, if they aren't already named that way. Then from the directory just created (now holds geom.xmt_txt and geom.spj) run:
-  ~matthb2/simmodelerconvert/testConvert
+  /users/matthb2/simmodelerconvert/testConvert
 Your directory now contains two new files: model.smd and model.x_t

@@ Line 32: / Line 32: @@
 == Creating new files ==
-Loading in geometry is about as intuitive as is possibly can be. Go to File -> Import Geometry, browse to the appropriate model, and select Open. Once open, it is possible to both mesh the model and to create boundary conditions for it. Because BLMesher is presently the primary meshing tool, it is only necessary to use SimModeler to create boundary conditions. Go to Analysis -> Select Solver, and select phasta. After selecting phasta, the Analysis Attributes option under Analysis becomes valid. Clicking it brings up the corresponding window. From this new window, it is possible to apply  boundary conditions and initial conditions by clicking the small button next to the drop down menu [add picture].
+Loading in geometry is about as intuitive as is possibly can be. Go to File -> Import Geometry, browse to the appropriate model, and select Open. Once open, it is possible to both mesh the model and to create boundary conditions for it. Because BLMesher is presently the primary meshing tool, it is only necessary to use SimModeler to create boundary conditions. Go to Analysis -> Select Solver, and select phasta. After selecting phasta, the Analysis Attributes option under Analysis becomes valid. Clicking it brings up the corresponding window. From this new window, it is possible to apply  boundary conditions and initial conditions by clicking the small button next to the drop down menu [add picture]. Note you must also double click on "problem definition" which will allow you to name the case.  Later post processing expects the name "geom" so always name it so.
 == Boundary conditions ==