Thermal Calculations - Revision history

Nairnj: /* References */

2026-03-29T17:22:45Z

References

← Older revision		Revision as of 17:22, 29 March 2026
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	<references>		<references>

	<ref name="transport">J. A. Nairn, "Coupling Transport Equations to Mechanics in the Material Point Method Using an Approximate Full Capacity Matrix Inverse," ''Computer Methods in Applied Mechanics and Engineering'', '''420''', 116757 (2024).</ref>		<ref name="transport">J. A. Nairn, "Coupling Transport Equations to Mechanics in the Material Point Method Using an Approximate Full Capacity Matrix Inverse," ''Computer Methods in Applied Mechanics and Engineering'', '''420''', 116757 (2024). ([https://www.cof.orst.edu/cof/wse/faculty/Nairn/papers/TransportPaper.pdf See PDF])</ref>

	</references>		</references>

Nairnj: /* Thermal Material Properties */

2026-03-29T17:22:13Z

Thermal Material Properties

← Older revision		Revision as of 17:22, 29 March 2026
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	The results of thermal calculations will depend on the thermal properties of the materials in the model, which should all be set when doing such calculations. The relevant thermal properties are thermal expansion coefficients, thermal conductivity, and heat capacity. See the [[Material Models\|material definitions]] for how to set these properties. A few [[Material Models\|material models]] and [[Hardening Laws\|hardening laws]] also depend on thermal transitions, such as a melting point, and on the [[#Stress Free Temperature\|stress free temperature]].		The results of thermal calculations will depend on the thermal properties of the materials in the model, which should all be set when doing such calculations. The relevant thermal properties are thermal expansion coefficients, thermal conductivity, and heat capacity. See the [[Material Models\|material definitions]] for how to set these properties. A few [[Material Models\|material models]] and [[Hardening Laws\|hardening laws]] also depend on thermal transitions, such as a melting point, and on the [[#Stress Free Temperature\|stress free temperature]].

			== References ==

			<references>

			<ref name="transport">J. A. Nairn, "Coupling Transport Equations to Mechanics in the Material Point Method Using an Approximate Full Capacity Matrix Inverse," ''Computer Methods in Applied Mechanics and Engineering'', '''420''', 116757 (2024).</ref>

			</references>

Nairnj: /* Conduction */

2026-03-29T17:21:14Z

Conduction

← Older revision		Revision as of 17:21, 29 March 2026
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	== Conduction ==		== Conduction ==

	The <tt>Conduction</tt> command activates thermal conductivity calculations and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation. By default, conduction uses update methods analogous to FLIP methods used in mechanics. This update, however, sometimes results in temperature oscillations on particles within one cell. Conduction simulations with oscillations can be improved by using [[PeriodicXPIC Custom Task#Using FMPM(k) For Transport Properties\|periodic FMPM(k)]] for conduction updates.		The <tt>Conduction</tt> command activates thermal conductivity calculations<ref name="transport"/> and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation. By default, conduction uses update methods analogous to FLIP methods used in mechanics. This update, however, sometimes results in temperature oscillations on particles within one cell. Conduction simulations with oscillations can be improved by using [[PeriodicXPIC Custom Task#Using FMPM(k) For Transport Properties\|periodic FMPM(k)]] for conduction updates.

	=== Scripted Input Commands ===		=== Scripted Input Commands ===

Nairnj: /* Scripted Input Commands */

2025-12-05T18:27:47Z

Scripted Input Commands

← Older revision		Revision as of 18:27, 5 December 2025
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	</ul>		</ul>

	<p>The optional parameters <tt>(option1)</tt>, <tt>(option2)</tt>, <i>etc</i>. can activate various physical mechanisms as heat sources that may cause temperature rises and may change the [[#Thermodynamics Modes in MPM\|thermodynamics]] of the analysis. The first two are complementary options (''i.e''., <tt>Adiabatic</tt> and <tt>Isothermal</tt> are complementary options, which means only one should be used. If both are omitted, the default setting is <tt>Isothermal</tt>.) are:		<p>The optional parameters <tt>(option1)</tt>, <tt>(option2)</tt>, <i>etc</i>. can activate various physical mechanisms as heat sources that may cause temperature rises and may change the [[#Thermodynamics Modes in MPM\|thermodynamics]] of the analysis. The first two are complementary options (''i.e''., <tt>Adiabatic</tt> and <tt>Isothermal</tt> are complementary options, which means only one should be used. If both are omitted, the default setting is <tt>Isothermal</tt>. The meaning of these options are:

	<ul>		<ul>

Nairnj: /* Material Support for Thermal Energy */

2023-01-31T04:17:28Z

Material Support for Thermal Energy

← Older revision		Revision as of 04:17, 31 January 2023
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	** [[Isotropic Softening Material\|IsoSoftening]]		** [[Isotropic Softening Material\|IsoSoftening]]
	** [[Isotropic Plastic Softening Material\|IsoPlasticSoftening]]		** [[Isotropic Plastic Softening Material\|IsoPlasticSoftening]]
	** [[Transversely Isotropic Softening Material\|TransIsoSoftening ~~1 (2)~~]]		** [[Transversely Isotropic Softening Material\|TransIsoSoftening]]
	** [[Mooney Material\|Mooney]] (from [[Common Material Properties#Artificial Viscosity\|artificial viscosity]])		** [[Mooney Material\|Mooney]] (from [[Common Material Properties#Artificial Viscosity\|artificial viscosity]])
	** [[Neo-Hookean Material\|Neohookean]] (from [[Common Material Properties#Artificial Viscosity\|artificial viscosity]])		** [[Neo-Hookean Material\|Neohookean]] (from [[Common Material Properties#Artificial Viscosity\|artificial viscosity]])

Nairnj at 17:03, 4 January 2021

2021-01-04T17:03:45Z

← Older revision		Revision as of 17:03, 4 January 2021
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	== Thermal Ramp ==		== Thermal Ramp ==

	To avoid thermal shocks, it is usually better to apply initial thermal fields using a [[~~ThermalRamp~~ Custom Task\|~~ThermalRamp~~ custom task]].		To avoid thermal shocks, it is usually better to apply initial thermal fields using a [[PropertyRamp Custom Task\|PropertyRamp custom task]].

	The scripting commands <tt>ThermalRamp</tt> and <tt>RampStart</tt> and the <tt>XML</tt> command <tt><Isothermal></tt> have been deleted and replaced by the new [[~~ThermalRamp~~ Custom Task\|~~ThermalRamp~~ custom task]].		The scripting commands <tt>ThermalRamp</tt> and <tt>RampStart</tt> and the <tt>XML</tt> command <tt><Isothermal></tt> have been deleted and replaced by the new [[PropertyRamp Custom Task\|PropertyRamp custom task]].

	== Thermodynamics Modes in MPM ==		== Thermodynamics Modes in MPM ==

Nairnj: /* Conduction */

2021-01-01T19:06:42Z

Conduction

← Older revision		Revision as of 19:06, 1 January 2021
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	== Conduction ==		== Conduction ==

	The <tt>Conduction</tt> command activates thermal conductivity calculations and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation. By default, conduction uses update methods analogous to FLIP methods used in mechanics. This update, however, sometimes results in temperature oscillations on particles within one cell. Conduction simulations with ~~osciallations~~ can be improved by using [[PeriodicXPIC Custom Task#Using FMPM(k) For Transport Properties\|periodic FMPM(k)]] for conduction ~~update~~.		The <tt>Conduction</tt> command activates thermal conductivity calculations and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation. By default, conduction uses update methods analogous to FLIP methods used in mechanics. This update, however, sometimes results in temperature oscillations on particles within one cell. Conduction simulations with oscillations can be improved by using [[PeriodicXPIC Custom Task#Using FMPM(k) For Transport Properties\|periodic FMPM(k)]] for conduction updates.

	=== Scripted Input Commands ===		=== Scripted Input Commands ===

Nairnj: /* Conduction */

2021-01-01T19:02:48Z

Conduction

← Older revision		Revision as of 19:02, 1 January 2021
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	== Conduction ==		== Conduction ==

	The <tt>Conduction</tt> command activates thermal conductivity calculations and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation. By default, conduction uses update methods analogous to FLIP methods used in mechanics. This update, however, sometimes results in temperature oscillations on particles within one cell. Conduction simulations with osciallations can be improved by using [[PeriodicXPIC Custom Task\|periodic FMPM(k)]] for conduction update.		The <tt>Conduction</tt> command activates thermal conductivity calculations and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation. By default, conduction uses update methods analogous to FLIP methods used in mechanics. This update, however, sometimes results in temperature oscillations on particles within one cell. Conduction simulations with osciallations can be improved by using [[PeriodicXPIC Custom Task#Using FMPM(k) For Transport Properties\|periodic FMPM(k)]] for conduction update.

	=== Scripted Input Commands ===		=== Scripted Input Commands ===

Nairnj: /* Conduction */

2021-01-01T19:02:18Z

Conduction

← Older revision		Revision as of 19:02, 1 January 2021
Line 21:		Line 21:
	== Conduction ==		== Conduction ==

	The <tt>Conduction</tt> command activates thermal conductivity calculations and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation. By default, conduction uses update methods analogous to FLIP methods used in mechanics. This update, however, sometimes results in temperature oscillations on particles within one cell. Conduction simulations with osciallations can be improved by using [[~~Periodic XPIC~~ Custom Task\|periodic FMPM(k)]] for conduction update.		The <tt>Conduction</tt> command activates thermal conductivity calculations and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation. By default, conduction uses update methods analogous to FLIP methods used in mechanics. This update, however, sometimes results in temperature oscillations on particles within one cell. Conduction simulations with osciallations can be improved by using [[PeriodicXPIC Custom Task\|periodic FMPM(k)]] for conduction update.

	=== Scripted Input Commands ===		=== Scripted Input Commands ===

Nairnj: /* Conduction */

2021-01-01T19:01:52Z

Conduction

← Older revision		Revision as of 19:01, 1 January 2021
Line 21:		Line 21:
	== Conduction ==		== Conduction ==

	The <tt>Conduction</tt> command activates thermal conductivity calculations and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation.		The <tt>Conduction</tt> command activates thermal conductivity calculations and also activates various optionals involving heat flow in the simulations or other mechanisms that cause temperature changes. These settings can change and select the [[#Thermodynamics Modes in MPM\|thermodynamics mode]] of the simulation. By default, conduction uses update methods analogous to FLIP methods used in mechanics. This update, however, sometimes results in temperature oscillations on particles within one cell. Conduction simulations with osciallations can be improved by using [[Periodic XPIC Custom Task\|periodic FMPM(k)]] for conduction update.

	=== Scripted Input Commands ===		=== Scripted Input Commands ===

← Older revision		Revision as of 04:17, 31 January 2023
Line 119:		Line 119:
	** [[Isotropic Softening Material\|IsoSoftening]]		** [[Isotropic Softening Material\|IsoSoftening]]
	** [[Isotropic Plastic Softening Material\|IsoPlasticSoftening]]		** [[Isotropic Plastic Softening Material\|IsoPlasticSoftening]]
	** [[Transversely Isotropic Softening Material\|TransIsoSoftening ~~1 (2)~~]]		** [[Transversely Isotropic Softening Material\|TransIsoSoftening]]
	** [[Mooney Material\|Mooney]] (from [[Common Material Properties#Artificial Viscosity\|artificial viscosity]])		** [[Mooney Material\|Mooney]] (from [[Common Material Properties#Artificial Viscosity\|artificial viscosity]])
	** [[Neo-Hookean Material\|Neohookean]] (from [[Common Material Properties#Artificial Viscosity\|artificial viscosity]])		** [[Neo-Hookean Material\|Neohookean]] (from [[Common Material Properties#Artificial Viscosity\|artificial viscosity]])