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# Thermal Properties - Science topic

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Questions related to Thermal Properties

We want to design a 5KW induction furnace system to melt aluminium at 800 degrees. So, could anyone suggest a better type of crucible having balanced electrical, magnetic and thermal properties?

In one of my works, I need to measure the specific heat capacity (Cp) of my ceramic samples up to or beyond 1100 degrees Celsius. Does anybody know any institutes where it is being done within India?

Hello friends, if a base fluid consists of 40% Ethylene glycol and 60% water, how can I find the thermal properties of the base fluid?

if someone have a file in such situation I wish if he/she send it to me.

Best regards

Using FGMs in the production of gears offers significant advantages in terms of wear resistance, thermal properties, mechanical performance, stress distribution, corrosion resistance, design flexibility, and long-term cost efficiency. These benefits make FGMs an attractive choice for high-performance and specialized gear applications where traditional materials may fall short. The ability to customize material properties precisely where needed allows for the development of gears that can withstand extreme conditions and deliver superior performance over their operational life.

How to calculate the thermal properties of hybrid nanofluids using equations or is there new research to obtain this information from?

I am trying simulation on natural circulation loop. when i am validating paper, all flow properties like mass flow rate, density and radial velocity is exactly matching with article. but when comes to thermal properties like local heat transfer coefficient and local heat flux, Grashoff number are not matching. what parameter i can change so that thermal properties match with research article.

?

Is it necessary to make powder of composite or to make a specific size disk of Silica-Polymer composite materials to measure their thermal properties, particularly specific heat, using Differential Scanning Calorimeter (DSC)?

The second law of thermodynamics contradicts itself, and scientists are still foolishly worshipping entropy. Please refer to the pictures and the following text for details.

1. The second law of thermodynamics states that Carnot efficiency is independent of the thermal properties of the working fluid.

2. Later, it can be inferred that the Carnot efficiency is related to the thermophysical properties of the working fluid.

3, 1, and 2 contradict each other.

4. Thermophysical properties of working fluid: E=E (V, T), P=P (V, T).

5. Aristotle proposed the theory of falling bodies, Galileo pointed out its contradiction, and Aristotle's theory was overturned.

6.The second law of thermodynamics contradicts itself, and scientists are still foolishly worshipping entropy

The second law of thermodynamics contradicts itself

The second law of thermodynamics recognized by scientists now contradicts itself, as shown in the picture:

1. The second law of thermodynamics states that Carnot efficiency is independent of the thermal properties of the working fluid.

2. Later, it can be inferred that the Carnot efficiency is related to the thermophysical properties of the working fluid.

3, 1, and 2 contradict each other.

4. Thermophysical properties of working fluid: E=E (V, T), P=P (V, T).

5. Aristotle proposed the theory of falling bodies, Galileo pointed out its contradiction, and Aristotle's theory was overturned.

Scientists are spreading and researching contradictory theories every day, and their mood is still very happy.

Hello

Can different element types be used for the two bodies with materials A (a layered material) and B (coated on A)? Material A is an electrically good insulator, while material B is electrically conductive. The Thermal Electrical Structural Element type cannot be used for layered materials like A. I want to treat material A with a solid or any other element type that does not include electrical or thermal properties, while material B should be treated with the thermal electrical and structural element type. Mechanical loads will be applied to body A, while electrical loads will be applied to material B. Is it possible to use different element types for these materials (Coated)? If not, what is the solution to this problem?

I want to measure the thermal conductivity of CdMnTe single crystals for various Mn concentrations. I wish to analyse the change in in thermal properties for the variation in Composition. I am looking for a suitable instrumentation facility.

By genetically modifying we can alter some properties of plants. But can we modify the biophysical, optical or thermal properties of leaves?

I am going to find the thermal properties of polymer nanocomposite. For that, I have planned to conduct THERMOGRAVIMETRIC ANALYSIS(TGA). Now, my question is, can I get DTG curve from TGA curve?

we use this material as phase change material in solar collector we need the thermal properties at the ambient temperature ( density (KG/m3 ) /cp specific heat [J/(kg k)]/ thermal conductivity ( w / mk) / thermal expansion coefficient [K-1] / viscosity (kg / ms) / pure solvent melting (J/kg) / solidus temperature and liquidus temperature [k]).

Using the Boltztrap and Quantum espresso I was able to calculate the electronic part of thermal conductivity but still struglling for the phononic part of thermal conductivity.

I tried the SHENGBTE but that demands a good computational facility and right now I am not having such type of workstation. Kindly suggest some other tool that can be useful for me in this regard.

Thanks,

Dr Abhinav Nag

I'm working on project where I need the thermal property of fertilizer but I have know Idea how to calculate it. Could anyone suggest the formula to calculate the thermal conductivity of solid mixture?

In many cases, e.g. the thermal hydraulics of thermal waters, or the HDR or the one tube heat extraction, the estimation of the rock/water heat exchange is of central importance. It now turns out, that not infrequently the thermal properties of water and rock are so different that the the properties of the water can be neglected. This leads to a drastic simplification of the rock/water heat exchange. This is shown by an example, the heat loss of the thermal water in the discharge section.

It is strange that apparently no one has seen this so far.

Can anyone provide ASTM E1007-90? For measuring concrete thermal property ASTM E1007 or ISO 10534-2-90 can be used?

We assume that the answer is yes and that it would be of great importance in the theory of heat conduction and in experimental measurements of the thermal properties of different materials.

I'm researching on the comparative analysis of the different waste-based innovations in the Philippines but the existing materials do not have information on its thermal properties. Is there any testing center in the Philippines that specializes in testing for thermal properties or maybe thermal comfort?

The study revolves around finding the mechanical as well as thermal properties of a bamboo species commonly found in North Eastern states of India. For example, on the preliminary studies conducted, there have been no such properties found for thermal coefficient of expansion, as well as the properties of the particular species to conduct analysis for FEM analysis on a Bamboo Cross-Section.

It would be of great help if someone could help me find these properties for my final year thesis.

Wishing a huge thanks to everyone in advance.

Hi there,

I'm working for graduation thesis, and want to simulate the heat generation process of 18650 battery, and i need to have some parameters from experiment like Resistance vs SOC, entropy change vs SOC, ... I searched the data sheet from manufacturer, but it's not enough.

Any body know about it? Please give me. Thank you so muchhh.

I have performed some thermal transport calculation of multi-component alloys using MD simulation. Now, I am trying to see the effect of chemical short-range order on these thermal properties. I have read some related papers, but they are not describing this method elaborately. If anybody can provide me some directions regarding this short-range order in MD simulations, it would be a great help.

I am studying and researching on a nano sheet using quantum espresso computing software. But how to do PDOS, phonon,thermal properties calculations
I do not know, with this software and I do not have anyone to teach me, please help me if you have information including: booklet, PDF, command ....thank you

I have a pipe that carries a fluid. The pipe is drawing heat from a source and is transferring to the fluid which is being circulated. I need to know the exit temperature of the fluid.

Known variables are:

1. Inlet temperature of the fluid

2. Inlet pressure of the fluid

3. Outlet pressure of the fluid

4. Constant mass flow rate

5. Thermal properties of the pipe

6. Temperature of the pipe

Goal:

Exit temperature of the fluid

How to proceed with this question?

Machine learning, for example Artificial Neuron Network method has benn widely used in predicting various properties of oxide glasses in recent years, including mechanical, chemical and thermal properties, etc. but it is rarely used for non-oxide glasses (e.g., fluoride, fluorophosphate, chalcogenide).

What is the reason, because few data can be obtained for non-oxide glasses as compared with the oxide ones?

Anyone has experienced using the AFLOW framework to predict the mechanical and thermal properties of high entropy alloys?

I am looking for the viscosity of paraffin waxes like C18 ,C22 and etc. I have been searching for the viscosity or temperature dependent viscosity of different paraffin waxes for a week and yet can not find it. Is there any reference that you can suggest, which include thermal properties of paraffin waxes such as C18, C22, OM47 and etc.?

I need to know the best proportions of graphene oxide to add in the cement mixture and does it affect the thermal properties?

I am using indocyanine green in my simulation research project. from google and disparate papers i got some optical property of ICG nevertheless i didn't found any thermal property! it would be so much obliging if someone render thermal and optical property of ICG for different wavelength of light !

I am using Gaussian 16 software.

Hi community

I'm working on a mono-layer compound I'm focused on electron phonon calculations and i want to calculate thermal properties such us thermal conductivity and electron phonon factor G i want to know how i can proceed

best

I am trying to simulate solar cell using Lumerical DEVICE smulation software. I need to add material data for electrical and thermal properties. Where to find those?

I require data for PCBM, PEDOT:PSS.

Kindly help.

Dear all,

How to calculate thermal conductivities of composites using 3DFEA based RVE analysis, can anyone suggest the procedure? in Abaqus CAE

Best regards

Nagappa

Hi I am working recently on a project where I have to study how the thermal properties or heat transfer enhancement of nanofluids as the volume fraction changes, or if a magnetic field is applied to a ferrofluid how does that affect the heat transfer. Is there a way I could model any of this in ANSYS. Im not sure but I was looking through ANSYS APDL to investigate this effects, is there a better way to model them.

I need

**thermophysical and electrical oil properties**to investigation of**DC discharge**in oil.Are multicomponent mixture models effective and precise in such calculations? If yes, what MC-modells can You suggest?

Can somebody advice something?

Thank you a lot in advance!

Especially the specific heat (Cp) at both liquid and solid phases. Thank you

I want to study the thermal properties of the composite (MWCNT+silver nanoparticles), so what method of synthesis do i use so that the composite sustains itself under elevated temperatures.

Hi all,

I am conducting physical experiments that involve heat exchange between the water being pumped inside a galvanized iron pipe and the pipe's surrounding heated temperature. I would later be simulating the physical experiments using a software (Fluent) as well and then comparing the numerical and experimental results. So, the thermal properties of the galvanized iron pipe I enter to the software should closely match the real properties of the pipe in order for the comparison to be successful.

I searched a lot of books but the thermal properties were either available for steel or galvanized steel. But I could not find any thermal properties for "galvanized iron" or even normal "cast/wrought iron". Hence, could anybody kindly suggest a resource where I may be able to find the thermal properties (thermal conductivity, specific heat capacity) of iron pipes - if possible "galvanized iron" specifically?

Your advice would be much appreciated.

Thank you!

I'm currently working on a project that involves the simulation of CHT (Conjugated Heat Transfer) problems potentially leading to the evaporation of a water/glycol mixture.

Thus I would need to have the thermal properties (especially the coefficient of volume expansion) of both ethylene glycol (1,2-ethanediol) and propylene glycol (1,2-propanediol) in liquid and gaseous phases.

So far I've managed to find (relatively easily) the properties of the liquid components, but nothing regarding the gaseous components.

Could someone points me in the right direction for such data ?

Greet

how can be defined S-CO2 thermal properties in EES?

it means that supercritical CO2 has changed thermal properties.

are the properties the same as CO2 in EES software?

please give me a hand.

thanks

I am looking for a formula to calculate specific temperature drop in duct based on airflow, knowing the specific power loss, airflow, thermal properties of the duct, and air temperatures. The goal is to be able to produce the graph attached.

Need to determine the thermal properties of a polymer.

I do not know how to determine if plasma treatment of lignocellulosic fibers provokes superficial crosslinking and increases hydrogen bonding between cellulose chains. I have only found unverified explanations and information to hypothesise. In this sense, does anyone know if experimental or modelling evaluation techniques are available?

In advance, thanks a lot for your answers to this question.

Here, some related references:

In order to model the crater formation (considering Inconel 825 as workpiece material) in EDM process, thermal properties such as Boiling temperature, Latent heat of melting and

Latent heat of vaporization are required. Where can I find the the values of the above mentioned properties.

Actually, I need free software for calculating thermal properties of crystalline solids namely,

**, and***lattice thermal conductivity***.***minimum thermal conductivity*I am working in 2D materials, please suggest best open access software for windows to analysis of electronic, optical and thermal properties

Hello to all :

This question is originated from the idea that every material (except for Superconductors) has a Seebeck Coefficient (S) different than zero, and from the idea that

**in every case when different metals or semiconductor materials are joined together, a Seebeck Effect at any scale is observed on the pair of materials**.So my question is:

When we measure the S of a given material, we place the sample between two plates at different temperatures, so we can stablish a Temperature Gradient and an unidirectional Heat Flux across the material. Then, we vary the Thermal Power imput, so we can vary the Temperature Gradient and obtain a set of Output Seebeck Voltages.

Then, we measure this Output Voltage and we plot a Graph of Delta(T) vs. Delta(V) as a linear x vs. y Graph. Finally we state that the slope of this Graph (positive for the N-Type materials and negative for P-Type) (because what we are measuring in our apparatus is the net Gradient (DeltaV/DeltaT), the formula in the Seebeck Coefficient has and additional (-) sign which turns S to a negative for N-Type semiconductors and positive por P-Type) is the Seebeck Coeff. for the material.

This measurement is

**always considered as if it was the absolute S coefficient**of the material. But,**What about the junction between the probe electrodes and our sample ?**Since**there is a Seebeck Voltage being generated at the junction too**. Hence, our**lecture from the voltmeter should be the Seebeck Coefficient of the junction: S**_{e,s}= S_{e}- S_{s}Where:

**S**: is the

_{e,s}**Seebeck Coefficient of the junction**between the sample and the electrode.

**S**: is the

_{e}**Seebeck Coefficient of the Electrode**.

**S**: is the

_{s}**Seebeck Coefficient of the Sample**.

What do you think ?

Is this error virtually zero in practice, as much as we can ignore the effect of the Seebeck Effect of the junction electrodes/sample ?

How can we understand the fact that when we use these methods, we never talk about the contribution of he probe electrodes into the measured S Coefficient ?

Kind Regards !

I am getting slightly different values of Tg from both DSC and DMA. The DMA results are giving me higher values of Tg compared to DSC. Which values should I trust?

Dear colleagues, hope you 'r having a good day :

I may get somehow involved in a project about Sb

_{2}S_{3}for possible thermoelectric uses, behold the motivation behind my question.I already searched for this in the literature, but the only I could find for was the electrical and thermal properties for Sb

_{2}S_{3}thin films. However I have bulk materials .Does anyone have a good reference for the measured (or values) Electrical Conductivity, Seebeck Coefficient & Thermal Conductivity for bulk-Sb

_{2}S_{3}, regardless of the fabrication method ? The material I have is a Sb_{2}S_{3}compacted pellet.Thank you for helping !

Regards ! :)

Dear all :

May anyone share with me a Graph showing the curves for

**Temperature vs Thermal Conductivity**, and**Temperature vs. Electrical Conductivity**/**Seebeck Coefficient**(in the same Graph) for distinct type of materials: (semiconductors, semiconductor alloys, metals, semimetals, etc.) showing the points in the**range up to 1000°C**?This is for use in Thermoelectric materials.

If someone can send it to me I'll appreciate it a lot

Thanks !

Dear Members,

I am presently working on a project that mandates the modelling of temperature distribution across unclothed and clothed human skin tissue. The modelling should take into account the environment properties like temperature, humidity, wind velocity and biological parameters of the human body like blood perfusion rate, metabolic heat generation rate, thermal properties of various skin tissues etc..The geometry is similar to a co-axial cylinder assembly with each annulus representing a different tissue, such as , skin, muscle, bone, and blood. Kindly suggest a stepwise procedure for solving the problem using ANSYS FLUENT. The geometry is attached herewith for your perusal. I am using Penne's Bioheat model. I have, however, not been able to include human tissue and its properties such as perfusion rate and metabolic heat generation rate in the material section. Kindly help.

I am trying to calculate the interaction of a laser with refractory borides such as ReB2 and require this data.

I am trying to model a composite made of both unidirectional and bidirectional prepregs. Is there a standard way to go about it? Furthermore how can one evaluate the thermal properties of a laminate made of BD prepregs?

I am a current MS Physics student where I work in a research lab studying condensed matter. Specifically, I use DFT based models (VASP, Quant. Espresso, Wien2k) and other software (ShengBTE, phonopy, thirdorder.py) to make calculations of electrical, magnetic, and thermal properties of materials.

I am curious to know how skills and experience with these programs translate in the professional world and career opportunities. I was unsure whether to post this as a question but I figured a discussion was more appropriate. I hope to get some insight from users of this site that can provide input on this topic. All responses are appreciated and encouraged.

Thank you.

Robert Appleton

CSULA Physics

Thermal properties calculation using quasi harmonic debye model.

I am looking for the thermal degradation pathway and products of 6-mercaptopurine (Temp.: 200-1000 Celsius, Inert atmosphere).

Any relevant reading suggestions are also much appreciated. Thanks.

Dear Sirs:

I am working on a heat transfer model for hollow alumina spheres for high temperature aplications, but I have had a difficult time finding the thermal properties of alumina (Al

_{2}O_{3}, 94-95% purity). In particular its thermal conductivity for a wide range of temperatures (300 K up to 2,000 K). It would be of great help if you could point me out to technical handbooks or specific research papers with empirical or even theoretical information for this property.Thanks in advance for your support.

Best Regards.

Nicolás Ripoll

I am looking for an instrument(s) to measure thermophysical properties, specifically the latent heat of melting, thermal conductivity, and heat capacity of a PCM (phase change material).

I need to characterize several metamaterials, specifically the thermal properties, I was wondering if there's a experimental technique focused in the measurement of the apparent thermal resistance of not heterogeneous materials with complex geometries such as the ones attached in this question.

**QUESTION 1):**According to the reference articles,

**hot disk method to low-density insulating materials**is considered to be

**questionable**, due to the low thermal conductivity and low thermal inertia of these materials when compared to the thermal properties of the probe.

Reference:

**Coquard, R., Coment, E., Flasquin, G., & Baillis, D. (2013).**

*Analysis of the hot-disk technique applied to low-density insulating materials.*

*International Journal of Thermal Sciences*,

*65*, 242-253.when the method is applied to materials with thermal inertia strongly different from the probe (≈2 order of magnitude lower or more), the accuracy of the method becomes questionable. This is notably the case for common insulators used in the building industry like polymer foam or mineral wools. The preceding conclusions have been validated by experimental measurements on a standard low-density XPS foam sample and a superinsulating silica areogel. This is particularly the case for low-density XPS foams whose thermal inertia (r.C) is almost 2 order of magnitude lower than (rNi.CNi) and (rKa.CKa). In this case, the relative errors on k and (r.C) can exceed 10%. Lower errors are found for insulating materials with larger thermal inertia such as silica aerogel.

I have a few factors like temperature, humidity, radiation and thermal characteristics that affect thermal comfort inside a building. Now, I need the thermal simulation for a model in Ansys.

For my undergrad thesis, I need to know CTE (Coefficient of Thermal Expansion), Poisson ratio, yield stress, Young's modulus of AZ91 magnesium alloy .

I'm working on a research where we use laser induced forward transfer to place a nanowire on an interdigitated micro-electrode. The nanowire is originally suspended on ethylene glycol and part of the EG evaporates as part of the process. To make an accurate simulation of this process I need the thermal properties of ethylene glycol. Thanks!

Is there a technique by which one can characterize a structural and thermal properties of material at low pressure?

Hi,

Kindly suggest some articles where I can get mechanical and thermal properties of HDPE as a function of temperature.

In tribology of polymer cases we know that:

In contrast to other materials, the tribological properties of polymers depend on the tensile strength and the toughness rather than on the hardness. Due to their thermal properties, polymers are very sensitive to frictional heating. Please suggests in case of friction stir welding of polymer, property mainly depend on tensile strength or toughness or hardness?

Your opinion is highly appreciated

Regards

Sudhir

We are adding RE elements in SnAgCu solder alloy to improve its thermal properties. Even through there isnt any large impact in decreasing of melting temperature then how to ananlyses the SAC alloy with these DSC graphs that its properties are improved. and what if graph contains more than one (or how closely or how large in amplitude) endothermic/exothermic peak.

thanks in advance

I need the following values (literature references) for ITO :

1) Thermal conductivity

2) Thermal Expansion

3) Specific Heat

**Preferably as a thin film.

Flexural and shear strength values of common building materials?