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Hi, I’m working on a colored flame candle development project and I’m looking for guidance from someone with chemistry experience. Objective:Create solid molded candles (not gel/container candles) that burn with bright visible flame colors such as red/magenta, green, and orange, ideally visible even in daylight. Key constraints for the project: Manufacturing must be simple and scalable. No complicated synthesis or multi-step laboratory reactions. Only cheap, easily available chemicals that can be sourced easily in the market. The candle should also support fragrance oils (scented candle). Avoid highly toxic compounds or chemicals that may create breathing hazards. Prefer materials that could realistically pass consumer product safety approvals. What I need help with:I...

Freelancer Brief – 3D Modeling Task We are developing a premium ergonomic cervical pillow made from molded memory foam. We need a parametric 3D CAD model suitable for industrial design and engineering simulation. Key requirements: • Dimensions: 600 x 350 mm pillow • Dual height: 95 mm and 120 mm • Central ergonomic cavity for the head • Cervical support ridge • Smooth ergonomic transitions • Manufacturing-ready geometry for foam molding Deliverables: • Parametric CAD model • STEP file • Native CAD file • 3 render views (top, perspective, section) The design should look premium and ergonomic similar to products from Tempur, Emma, or Cushion Lab, but must be original.

I need a design review for an electric heater with fan and heating element due to field failures. The specific issues are overheating and electrical shorts. Key Focus Areas: - Electrical Circuitry: Review and identify design flaws - Overheating: Analyze potential causes - Electrical Shorts: Investigate and recommend fixes Ideal Skills and Experience: - Expertise in electrical engineering - Experience with heating appliances design - Problem-solving skills for safety issues

I need a complete, production-ready design for a 100 W LED luminaire that will serve as the main light source in a living-room setting while still being robust enough for occasional outdoor use. The fixture must deliver high lumen output with excellent efficacy, maintain color stability over time, and integrate smoothly with common smart-home ecosystems (Wi-Fi, Zigbee, or similar). Scope of work • Component selection: high-efficiency LED array, constant-current driver, thermal interface materials, optics, housing, and an IP-rated enclosure or coating suitable for indoor/outdoor crossover use. • Electrical design: full schematic and PCB layout for the LED driver, MCU or smart-control module, surge and polarity protection, and any required EMC filtering. • Thermal manag...

I need a seasoned academic writer who can craft a 4,000–5,000-word manuscript on “Molecular Design of Silicone Adhesives with Thermal Resistance at 500 °C and Synergistic Acid-Thermal Aging Mechanism,” polished enough for submission to an EI-indexed journal. Scope and focus The paper must be organised in my custom structure—Abstract, Literature Review, Methodology, Findings, Discussions and Implications—with particular strength in the Analysis and Results content. You will be drawing on up-to-date polymer chemistry and materials-science literature, then translating experimental insights into a clear narrative that highlights how molecular design choices translate into sustained performance at 500 °C, especially under combined acid and thermal stress...

- Perform full CFD combustion simulation of a small combustor chamber (LPG or propane fuel, non-premixed combustion model) in ANSYS Fluent Student Version only(max 1000000 cells). - Use a non-premixed PDF combustion model with my PDF table (already created), mass flow inlet BCs (air 0.338 kg/s, fuel 0.0106 kg/s), and correct velocity directions from dome holes. - Run mesh independence study (4–5 meshes) and report outlet total temperature, residuals, and computational time until mesh-independent result is achieved. - Extract and calculate convective + radiative heat flux or temp on liner walls, total heat loss to walls (target ~8–10% of heat input), and wall temperature distribution. - Perform **steady-state thermal analysis** inside Fluent: import the CFD heat flux or wall t...

I'm seeking an expert to optimize the energy performance of an existing building model on DesignBuilder. The focus is on reducing overall energy consumption, primarily through HVAC system optimization. Key Tasks: - Analyze current HVAC system efficiency. - Implement strategies to enhance system efficiency. - Provide recommendations for energy-saving modifications. Ideal Skills and Experience: - Proficiency in DesignBuilder. - Strong background in HVAC systems and energy optimization. - Analytical skills to assess and improve energy performance. - Experience with similar projects. Looking for a detail-oriented professional who can deliver actionable insights and improvements.

Please be careful, you must create the 3 real PCBs; we are not interested in virtual projects. After the 3 PCBs have been successfully tested here in our office, we will release the money following the rules of freelacer.com. I will agree on the cost of the work and the time of execution with the developer. I've already built some prototypes of a circuit capable of switching a single 230 V, 16–30 A line to 4, 8, or 12 outputs—without power loss—but none of them have reached the standards I expect. I have schematics, calculations, thermal measurements, and test logs: enough material to clarify every technical detail and speed up your work. I need a senior designer who can transform all this into a final solution, complete with ESP32 firmware, a multilayer PCB (4 or...

. Your first task is to redraw the key plan and section in CAD so they are clean, fully dimensioned, and ready for further assessment. From there, I need a complete evaluation of how the building performs thermally and overall in terms of sustainability. Use whichever simulation tools you consider most reliable—EnergyPlus, IES-VE, DesignBuilder, or similar are all acceptable—as long as the findings are clearly documented and traceable back to the model assumptions. Once the whole-building study is in hand, we will zoom in on a single representative space. I’m looking for a rigorous daylight analysis (Radiance, Dialux, or equivalent) alongside an acoustic review that considers reverberation time, background noise levels, and any potential sound-transfer issues through par...

The work starts with a whole-building review, then zooms in on one representative space, and finally brings everything together to show how the environmental systems are woven into the architecture. Scope of analysis First, needs toredraw accurate plans and sections in Rhino and export them to Illustrator to build clear, annotated environmental diagrams. The study then moves on site where I will collect data with lux and sound-meter apps. Grasshopper and Ladybug may come into play if they help illustrate findings, but the emphasis is on measured performance rather than full-blown simulation. Primary focus The core of the brief is thermal performance, with particular attention to: • Heating and cooling efficiency • Thermal comfort levels Lighting and acoustic observat...

I need support completing an academic assignment that critiques how a real building performs environmentally. The work starts with a whole-building review, then zooms in on one representative space, and finally brings everything together to show how the environmental systems are woven into the architecture. Scope of analysis First, needs toredraw accurate plans and sections in Rhino and export them to Illustrator to build clear, annotated environmental diagrams. The study then moves on site where I will collect data with lux and sound-meter apps. Grasshopper and Ladybug may come into play if they help illustrate findings, but the emphasis is on measured performance rather than full-blown simulation. Primary focus The core of the brief is thermal performance, with particular attention...

I need an FEM simulation for a static compression test on aluminum with double varying friction. Ansys 2025R2 Requirements: - Model aluminum's yield strength, modulus of elasticity, and Poisson's ratio - Account for double varying friction in the simulation Ideal Skills & Experience: - Proficiency in FEM analysis software (e.g., ANSYS) - Strong background in material science, specifically with aluminum - Experience with friction modeling in FEM simulations Please provide relevant work samples and a detailed approach.

Please provide your price Deadline : 15 March ANSYS Simulation Services Project: Design & Simulation of Thermoelectric Generators (TEGs) for Waste-to-Energy (WTE) Incinerator Exhaust Software: ANSYS Mechanical APDL 2025 R2 (SOLID226) ⸻ 1. PURPOSE To develop a fully coupled thermo-electric-mechanical finite element simulation framework for Thermoelectric Generator (TEG) modules operating under WTE exhaust temperatures (600–900 K). ⸻ 2. SCOPE OF WORK The Contractor shall perform the following tasks: ⸻ A. Baseline FEM Model Development • Develop a parametric 3D unicouple model (P-leg, N-leg, copper pads, ceramic substrates) • Implement temperature-dependent material properties: • Seebeck coefficient α(T) • Thermal conductivity k(T) • Electr...