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import essm | |
class eq_test(essm.equations.Equation): | |
expr = 1 == 1 |
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{ | |
"cells": [ | |
{ | |
"cell_type": "code", | |
"execution_count": 2, | |
"metadata": {}, | |
"outputs": [], | |
"source": [ | |
"# Import standard variables from physics module\n", | |
"from essm.variables.physics.thermodynamics import lambda_E, c_pa\n", | |
"\n", | |
"# Define custom variables\n", | |
"class E_w(Variable):\n", | |
" \"\"\"Wet surface evaporation\n", | |
" (E in Priestley and Taylor, 1972))\n", | |
" \"\"\"\n", | |
" unit = kilogram/meter^2/second\n", | |
" latex_name = 'E'\n", | |
" \n", | |
"class H_w(Variable):\n", | |
" \"\"\"Wet surface sensible heat flux (positive outwards)\"\"\"\n", | |
" unit = joule/second/meter^2\n", | |
" latex_name = 'H'\n", | |
" \n", | |
"class q_a(Variable):\n", | |
" \"\"\"Specific humidity\"\"\"\n", | |
" unit = kilogram/meter^3\n", | |
" \n", | |
"class q_s(Variable):\n", | |
" \"\"\"Specific humidity at saturation\"\"\"\n", | |
" unit = kilogram/meter^3\n", | |
" \n", | |
"class s_PT(Variable):\n", | |
" \"\"\"Priestley-Taylor $\\partial q_s/\\partial T$\"\"\"\n", | |
" unit = kilogram/meter^3/kelvin\n", | |
" latex_name = 's'\n", | |
" \n", | |
"class T(Variable):\n", | |
" \"\"\"Temperature\"\"\"\n", | |
" unit = kelvin\n", | |
"\n", | |
"# Re-define `lambda_E` as `L_E` to have the same latex representation as in the paper\n", | |
"class L_E(lambda_E.definition):\n", | |
" \"\"\"Latent heat\"\"\" \n", | |
" latex_name = 'L'\n", | |
" default = lambda_E.definition.default\n", | |
" unit = lambda_E.definition.unit\n", | |
" \n", | |
"# Define `gamma_PT = c_pa/L_E` as in the paper\n", | |
"class gamma_PT(Variable):\n", | |
" \"\"\"Priestley-Taylor $\\gamma$\"\"\"\n", | |
" expr = c_pa/L_E\n", | |
" latex_name = r'\\gamma'" | |
] | |
} | |
], | |
"metadata": { | |
"kernelspec": { | |
"display_name": "SageMath 7.6", | |
"language": "", | |
"name": "sagemath" | |
}, | |
"language_info": { | |
"codemirror_mode": { | |
"name": "ipython", | |
"version": 2 | |
}, | |
"file_extension": ".py", | |
"mimetype": "text/x-python", | |
"name": "python", | |
"nbconvert_exporter": "python", | |
"pygments_lexer": "ipython2", | |
"version": "2.7.13" | |
}, | |
"nav_menu": {}, | |
"toc": { | |
"navigate_menu": true, | |
"number_sections": true, | |
"sideBar": true, | |
"threshold": 6, | |
"toc_cell": false, | |
"toc_section_display": "block", | |
"toc_window_display": false | |
} | |
}, | |
"nbformat": 4, | |
"nbformat_minor": 2 | |
} |
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