Evaporation Simulation in Capillary Tube
Budget: $30 – $250 USD
**Project Title:**
COMSOL Multiphysics Simulation – Evaporation & Dynamic Meniscus Formation in Capillary Tube
**Project Description:**
I am looking for a COMSOL expert (chemical engineer/physicist) to simulate evaporation of liquid inside a vertical capillary tube using COMSOL Multiphysics (latest version preferred).
### Model Requirements:
* 2D transient model
* Geometry: Rectangle (0.025 mm width × 0.1 mm height)
* Vertical capillary tube
* Initially fully filled with water
* Room temperature conditions
* Evaporation driven by mass transfer (NOT temperature gradient)
* Outlet atmospheric humidity ≈ 50%
* Contact angle must form naturally (not fixed manually)
### Physics Expectations:
* Proper two-phase flow modeling (Level Set or Phase Field preferred)
* Surface tension effects included
* Transient moving interface (meniscus evolution)
* Realistic mass transfer modeling for evaporation
Simplified or quasi-static approaches will not be accepted.
### Expected Deliverables:
1. Animation showing dynamic meniscus evolution
* Time displayed
* Volume fraction of liquid shown during animation
2. Plot: Time vs liquid volume fraction
3. CSV files:
* Liquid volume vs time
* Evaporated mass vs time
4. Screen recording of full COMSOL simulation process
5. Explanation document:
* Physics used
* Parameters selected
* Reasoning behind modeling choices
### Part 2 Extension:
Repeat the simulation, replacing water with SDS solution at:
* 0.1 wt%
* 0.3 wt%
Including a comparison of results.
Please only apply if you have strong experience in:
* COMSOL Multiphysics
* Multiphase flow
* Mass transfer modeling
* Moving boundary/interface problems
When bidding, please briefly explain:
* Which physics interfaces would you use
* How would you implement evaporation
* Your experience with two-phase flow simulations
COMSOL Multiphysics Simulation – Evaporation & Dynamic Meniscus Formation in Capillary Tube
**Project Description:**
I am looking for a COMSOL expert (chemical engineer/physicist) to simulate evaporation of liquid inside a vertical capillary tube using COMSOL Multiphysics (latest version preferred).
### Model Requirements:
* 2D transient model
* Geometry: Rectangle (0.025 mm width × 0.1 mm height)
* Vertical capillary tube
* Initially fully filled with water
* Room temperature conditions
* Evaporation driven by mass transfer (NOT temperature gradient)
* Outlet atmospheric humidity ≈ 50%
* Contact angle must form naturally (not fixed manually)
### Physics Expectations:
* Proper two-phase flow modeling (Level Set or Phase Field preferred)
* Surface tension effects included
* Transient moving interface (meniscus evolution)
* Realistic mass transfer modeling for evaporation
Simplified or quasi-static approaches will not be accepted.
### Expected Deliverables:
1. Animation showing dynamic meniscus evolution
* Time displayed
* Volume fraction of liquid shown during animation
2. Plot: Time vs liquid volume fraction
3. CSV files:
* Liquid volume vs time
* Evaporated mass vs time
4. Screen recording of full COMSOL simulation process
5. Explanation document:
* Physics used
* Parameters selected
* Reasoning behind modeling choices
### Part 2 Extension:
Repeat the simulation, replacing water with SDS solution at:
* 0.1 wt%
* 0.3 wt%
Including a comparison of results.
Please only apply if you have strong experience in:
* COMSOL Multiphysics
* Multiphase flow
* Mass transfer modeling
* Moving boundary/interface problems
When bidding, please briefly explain:
* Which physics interfaces would you use
* How would you implement evaporation
* Your experience with two-phase flow simulations