Mechanical APDL Basic Analysis Guide - Ansys
Mechanical APDL Basic Analysis Guide - Ansys Mechanical APDL Basic Analysis Guide - Ansys
Chapter 7:The General Postprocessor (POST1) Plotting that same particle in the presence of both the electric and magnetic fields (with E normal to B) would then look like this: Other commands are: • TRPLIS command (Main Menu> General Postproc> Plot Results> Flow Trace> List Trace Pt) - lists trace points. • TRPDEL command (Main Menu> General Postproc> Plot Results> Flow Trace> Dele Trace Pt) - deletes trace points. • TRTIME command (Main Menu> General Postproc> Plot Results> Flow Trace> Time Interval) - defines the flow trace time interval. • ANFLOW command (Utility Menu> PlotCtrls> Animate> Particle Flow) - generates an animated sequence of particle flow. Notes • Three array parameters are created at the time of the particle trace: TRACPOIN, TRACDATA and TRACLABL. These array parameters can be used to put the particle velocity and the elapsed time into path form. The procedure to put the arrays into a path named PATHNAME is as follows: 144 *get,npts,PARM,TRACPOIN,DIM,x PATH,PATHNAME,npts,9,1 PAPUT,TRACPOIN,POINTS PAPUT,TRACDATA,TABLES PAPUT,TRACLABL,LABELS PRPATH,S,T_TRACE,VX_TRACE,VY_TRACE,VZ_TRACE,VS_TRACE Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates.
• Particle flow traces occasionally stop for no apparent reason. This can occur in stagnant flow regions, near wall flow regions, or when a particle is tracking along an element edge. To resolve the problem, adjust the initial particle point slightly in the cross stream direction. • For charged particle traces, the variables Chrg and Mass input by the TRPOIN command (Main Menu> General Postproc> Plot Results> Flow Trace> Defi Trace Pt) have units of Coulombs and kilograms, respectively, in the MKS system. • The particle tracing algorithm could lead to an infinite loop. For example, a charged particle trace could lead to an infinite circular loop. To avoid infinite loops, the PLTRAC command argument MXLOOP sets a limiting value. • Charge particle tracing could be performed after an electrostatic analysis (using only electric field), or after a magnetostatic analysis using only magnetic field or coupled magnetic and electric fields. The latter case could be done using the electric field as a body load applied either with BFE,EF command or with LDREAD,EF command. 7.2.1.7. Cracking and Crushing Plots If you have SOLID65 elements in your model, you can use the PLCRACK command (Main Menu> General Postproc> Plot Results> Crack/Crush) to determine which elements have cracked and/or crushed. Small circles will be shown where the concrete has cracked, and small octagons will be shown where the concrete has crushed (see Figure 7.10 (p. 145)). The cracking and crushing symbols are visible when a non-hidden, vector type of display is used. To specify such a device, issue the command /DEVICE,VECTOR,ON (Utility Menu> PlotCtrls> Device Options). Figure 7.10 Concrete Beam with Cracks 7.2.2. Surface Operations You can map any nodal results data onto a user defined surface in POST1. You can then perform mathematical operations on these surface results to calculate meaningful quantities, including total force or average stress for a cross section, net charge inside a closed volume, fluid mass flow rate, heat flow for a cross section, and more. You can also plot contours of the mapped results. Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates. 7.2.2. Surface Operations 145
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Chapter 7:The General Postprocessor (POST1)<br />
Plotting that same particle in the presence of both the electric and magnetic fields (with E<br />
normal to B) would then look like this:<br />
Other commands are:<br />
• TRPLIS command (Main Menu> General Postproc> Plot Results> Flow Trace> List Trace Pt) - lists<br />
trace points.<br />
• TRPDEL command (Main Menu> General Postproc> Plot Results> Flow Trace> Dele Trace Pt) - deletes<br />
trace points.<br />
• TRTIME command (Main Menu> General Postproc> Plot Results> Flow Trace> Time Interval) -<br />
defines the flow trace time interval.<br />
• ANFLOW command (Utility Menu> PlotCtrls> Animate> Particle Flow) - generates an animated sequence<br />
of particle flow.<br />
Notes<br />
• Three array parameters are created at the time of the particle trace: TRACPOIN, TRACDATA and TRACLABL.<br />
These array parameters can be used to put the particle velocity and the elapsed time into path form.<br />
The procedure to put the arrays into a path named PATHNAME is as follows:<br />
144<br />
*get,npts,PARM,TRACPOIN,DIM,x<br />
PATH,PATHNAME,npts,9,1<br />
PAPUT,TRACPOIN,POINTS<br />
PAPUT,TRACDATA,TABLES<br />
PAPUT,TRACLABL,LABELS<br />
PRPATH,S,T_TRACE,VX_TRACE,VY_TRACE,VZ_TRACE,VS_TRACE<br />
Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information<br />
of ANSYS, Inc. and its subsidiaries and affiliates.
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